~~MASTR~~SECURITIES ~~Seasoned~~AND ~~Securitization~~EXCHANGE Trust Mortgage Pass-Through Certificates Record Date: 5/31/2005 Distribution Date: 6/27/2005 MASTR Seasoned Securitization Trust Mortgage Pass-Through Certificates Series 2005-1 Contact: Customer Service - CTSLink Wells Fargo Bank, N.A. Securities Administration Services 7485 New Horizon Way Frederick, MD 21703 www.ctslink.com Telephone: (301) 815-6600 Fax: (301) 815-6660 Certificateholder Distribution Summary Certificate Certificate Beginning Class Pass-Through Certificate Interest Class CUSIP Description Rate Balance Distribution 1-A-1 55265WCF8 SEN 6.73462% 185,164,705.68 1,039,177.69 2-A-1 55265WCH4 SEN 6.19798% 99,524,555.48 514,042.74 3-A-1 55265WCJ0 SEN 5.87393% 48,007,777.19 234,995.22 4-A-1 55265WCK7 SEN 5.91674% 48,179,220.91 237,553.39 4-A-2 55265WCL5 SEN 5.91674% 5,353,764.94 26,397.38 AL-R 55265WCM3 RES 6.73215% 0.00 0.00 A-UR 55265WCN1 SEN 6.73215% 0.00 0.00 15-B-1 55265WCP6 SUB 6.19798% 427,290.78 2,206.95 15-B-2 55265WCQ4 SUB 6.19798% 212,656.29 1,098.37 15-B-3 55265WCR2 SUB 6.19798% 159,244.95 822.50 30-B-1 55265WCS0 SUB 6.73462% 5,000,945.29 28,066.21 30-B-2 55265WCT8 SUB 6.73462% 412,839.75 2,316.93 30-B-3 55265WCU5 SUB 6.73462% 309,131.21 1,734.90 HY-B-1 55265WCV3 SUB 5.89629% 2,241,964.24 11,016.05 HY-B-2 55265WCW1 SUB 5.89629% 338,390.86 1,662.71 HY-B-3 55265WCX9 SUB 5.89629% 225,593.91 1,108.47 CB-4 55265WCY7 SUB 6.35369% 425,102.24 2,250.81 CB-5 55265WCZ4 SUB 6.35369% 267,804.45 1,417.96 CB-6 55265WDA8 SUB 6.35369% 433,639.15 2,296.01 Totals 396,684,627.32 2,108,164.29COMMISSION

~~Certificateholder Distribution Summary (continued) Current Ending Cumulative Principal Realized Certificate Total Realized Class Distribution Loss Balance Distribution Losses 1-A-1 4~~Washington,~~179,255.70~~ 0D.~~00 180,985,449~~C.98 5,218,433.39 0.00 2-A-1 2,350,548.53 0.00 97,174,006.95 2,864,591.27 0.00 3-A-1 1,656,338.40 0.00 46,351,438.79 1,891,333.62 0.00 4-A-1 2,478,922.57 0.00 45,700,298.34 2,716,475.96 0.00 4-A-2 275,462.50 0.00 5,078,302.44 301,859.88 0.00 AL-R 0.00 0.00 0.00 0.00 0.00 A-UR 0.00 0.00 0.00 0.00 0.00 15-B-1 2,388.36 0.00 424,902.43 4,595.31 0.00 15-B-2 1,188.65 0.00 211,467.64 2,287.02 0.00 15-B-3 890.11 0.00 158,354.84 1,712.61 0.00 30-B-1 7,118.90 0.00 4,993,826.39 35,185.11 0.00 30-B-2 587.68 0.00 412,252.07 2,904.61 0.00 30-B-3 440.05 0.00 308,691.16 2,174.95 0.00 HY-B-1 2,029.43 0.00 2,239,934.81 13,045.48 0.00 HY-B-2 306.31 0.00 338,084.55 1,969.02 0.00 HY-B-3 204.21 0.00 225,389.70 1,312.68 0.00 CB-4 961.13 0.00 424,141.11 3,211.94 0.00 CB-5 605.49 0.00 267,198.96 2,023.45 0.00 CB-6 980.43 0.00 432,658.71 3,276.44 0.00 Totals 10,958,228.45 0.00 385,726,398.87 13,066,392.74 0.00 All distributions required by the Pooling and Servicing Agreement have been calculated by the Certificate Administrator on behalf of the Trustee. 20549

~~Principal~~Form ~~Distribution Statement Original Beginning Scheduled Unscheduled Face Certificate Principal Principal Realized Class Amount Balance Distribution Distribution Accretion Loss (1) 1~~8-A-1 200,960,000.00 185,164,705.68 263,584.14 3,915,671.56 0.00 0.00 2-A-1 106,791,000.00 99,524,555.48 556,296.37 1,794,252.16 0.00 0.00 3-A-1 52,510,000.00 48,007,777.19 45,801.22 1,610,537.18 0.00 0.00 4-A-1 51,655,000.00 48,179,220.91 41,459.51 2,437,463.06 0.00 0.00 4-A-2 5,740,000.00 5,353,764.94 4,607.06 270,855.44 0.00 0.00 AL-R 50.00 0.00 0.00 0.00 0.00 0.00 A-UR 50.00 0.00 0.00 0.00 0.00 0.00 15-B-1 432,000.00 427,290.78 2,388.36 0.00 0.00 0.00 15-B-2 215,000.00 212,656.29 1,188.65 0.00 0.00 0.00 15-B-3 161,000.00 159,244.95 890.11 0.00 0.00 0.00 30-B-1 5,015,000.00 5,000,945.29 7,118.90 0.00 0.00 0.00 30-B-2 414,000.00 412,839.75 587.68 0.00 0.00 0.00 30-B-3 310,000.00 309,131.21 440.05 0.00 0.00 0.00 HY-B-1 2,246,000.00 2,241,964.24 2,029.43 0.00 0.00 0.00 HY-B-2 339,000.00 338,390.86 306.31 0.00 0.00 0.00 HY-B-3 226,000.00 225,593.91 204.21 0.00 0.00 0.00 CB-4 427,000.00 425,102.24 961.13 0.00 0.00 0.00 CB-5 269,000.00 267,804.45 605.49 0.00 0.00 0.00 CB-6 435,575.02 433,639.15 980.43 0.00 0.00 0.00 Totals 428,145,675.02 396,684,627.32 929,449.05 10,028,779.40 0.00 0.00 (1) Amount Does Not Include Excess Special Hazard, Bankruptcy, or Fraud Losses Unless Otherwise Disclosed. Please Refer to the Prospectus Supplement for a Full Description.K

~~Principal~~CURRENT Distribution Statement (continued) Total Ending Ending Total Principal Certificate Certificate Principal Class Reduction Balance Percentage Distribution 1-A-1 4,179,255.70 180,985,449.98 0.90060435 4,179,255.70 2-A-1 2,350,548.53 97,174,006.95 0.90994566 2,350,548.53 3-A-1 1,656,338.40 46,351,438.79 0.88271641 1,656,338.40 4-A-1 2,478,922.57 45,700,298.34 0.88472168 2,478,922.57 4-A-2 275,462.50 5,078,302.44 0.88472168 275,462.50 AL-R 0.00 0.00 0.00000000 0.00 A-UR 0.00 0.00 0.00000000 0.00 15-B-1 2,388.36 424,902.43 0.98357044 2,388.36 15-B-2 1,188.65 211,467.64 0.98357042 1,188.65 15-B-3 890.11 158,354.84 0.98357043 890.11 30-B-1 7,118.90 4,993,826.39 0.99577794 7,118.90 30-B-2 587.68 412,252.07 0.99577795 587.68 30-B-3 440.05 308,691.16 0.99577794 440.05 HY-B-1 2,029.43 2,239,934.81 0.99729956 2,029.43 HY-B-2 306.31 338,084.55 0.99729956 306.31 HY-B-3 204.21 225,389.70 0.99729956 204.21 CB-4 961.13 424,141.11 0.99330471 961.13 CB-5 605.49 267,198.96 0.99330468 605.49 CB-6 980.43 432,658.71 0.99330469 980.43 Totals 10,958,228.45 385,726,398.87 0.90092326 10,958,228.45REPORT

~~Principal~~Pursuant ~~Distribution~~to ~~Factors~~Section ~~Statement~~13 ~~Original~~or Beginning Scheduled Unscheduled Face Certificate Principal Principal Class (2) Amount Balance Distribution Distribution Accretion 1-A-1 200,960,000.00 921.40080454 1.31162490 19.48483061 0.00000000 2-A-1 106,791,000.00 931.95639595 5.20920649 16.80152972 0.00000000 3-A-1 52,510,000.00 914.25970653 0.87223805 30.67105656 0.00000000 4-A-1 51,655,000.00 932.71166218 0.80262337 47.18735960 0.00000000 4-A-2 5,740,000.00 932.71166202 0.80262369 47.18735889 0.00000000 AL-R 50.00 0.00000000 0.00000000 0.00000000 0.00000000 A-UR 50.00 0.00000000 0.00000000 0.00000000 0.00000000 15-B-1 432,000.00 989.09902778 5.52861111 0.00000000 0.00000000 15-B-2 215,000.00 989.09902326 5.52860465 0.00000000 0.00000000 15-B-3 161,000.00 989.09906832 5.52863354 0.00000000 0.00000000 30-B-1 5,015,000.00 997.19746560 1.41952144 0.00000000 0.00000000 30-B-2 414,000.00 997.19746377 1.41951691 0.00000000 0.00000000 30-B-3 310,000.00 997.19745161 1.41951613 0.00000000 0.00000000 HY-B-1 2,246,000.00 998.20313446 0.90357524 0.00000000 0.00000000 HY-B-2 339,000.00 998.20312684 0.90356932 0.00000000 0.00000000 HY-B-3 226,000.00 998.20314159 0.90358407 0.00000000 0.00000000 CB-4 427,000.00 995.55559719 2.25088993 0.00000000 0.00000000 CB-5 269,000.00 995.55557621 2.25089219 0.00000000 0.00000000 CB-6 435,575.02 995.55559913 2.25088666 0.00000000 0.00000000 (2d) ~~All~~of ~~Classes are per $1,000 denomination~~the

~~Principal~~Securities ~~Distribution~~Exchange ~~Factors~~Act ~~Statement~~of (continued) Total Ending Ending Total Realized Principal Certificate Certificate Principal Class Loss (3) Reduction Balance Percentage Distribution 1-A-1 0.00000000 20.79645551 900.60434902 0.90060435 20.79645551 2-A-1 0.00000000 22.01073620 909.94565975 0.90994566 22.01073620 3-A-1 0.00000000 31.54329461 882.71641192 0.88271641 31.54329461 4-A-1 0.00000000 47.98998296 884.72167922 0.88472168 47.98998296 4-A-2 0.00000000 47.98998258 884.72167944 0.88472168 47.98998258 AL-R 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 A-UR 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 15-B-1 0.00000000 5.52861111 983.57043981 0.98357044 5.52861111 15-B-2 0.00000000 5.52860465 983.57041860 0.98357042 5.52860465 15-B-3 0.00000000 5.52863354 983.57043478 0.98357043 5.52863354 30-B-1 0.00000000 1.41952144 995.77794417 0.99577794 1.41952144 30-B-2 0.00000000 1.41951691 995.77794686 0.99577795 1.41951691 30-B-3 0.00000000 1.41951613 995.77793548 0.99577794 1.41951613 HY-B-1 0.00000000 0.90357524 997.29955922 0.99729956 0.90357524 HY-B-2 0.00000000 0.90356932 997.29955752 0.99729956 0.90356932 HY-B-3 0.00000000 0.90358407 997.29955752 0.99729956 0.90358407 CB-4 0.00000000 2.25088993 993.30470726 0.99330471 2.25088993 CB-5 0.00000000 2.25089219 993.30468401 0.99330468 2.25089219 CB-6 0.00000000 2.25088666 993.30468951 0.99330469 2.25088666 (3) Amount Does Not Include Excess Special Hazard, Bankruptcy, or Fraud Losses Unless Otherwise Disclosed. Please Refer to the Prospectus Supplement for a Full Description.1934

~~Interest~~Date ~~Distribution Statement Beginning Payment~~ of ~~Original~~Report: July ~~Current Certificate/ Current Unpaid Current Face Certificate Notional Accrued Interest Interest Class Amount Rate Balance Interest Shortfall Shortfall 1-A-1 200~~14,~~960,000.00~~ ~~6.73462%~~2005 (date ~~185,164,705.68~~of ~~1,039,177.69~~earliest ~~0.00~~event ~~0.00~~reported) MORTGAGE ~~2-A-1~~ASSET ~~106,791,000.00~~SECURITIZATION ~~6.19798% 99~~TRANSACTIONS,~~524,555.48~~ ~~514,042~~INC.74 ~~0.00~~(as ~~0.00~~depositor ~~3-A-1~~under ~~52,510,000.00~~the ~~5.87393%~~Pooling ~~48,007,777.19~~and ~~234,995.22~~Servicing ~~0.00 0.00 4-A-1 51~~Agreement,~~655,000.00~~ ~~5.91674%~~relating ~~48,179,220.91~~to ~~237,553.39~~the ~~0.00~~MASTR ~~0.00~~Seasoned ~~4-A-2~~Securitization ~~5,740,000.00~~Trust ~~5.91674% 5,353,764.94 26,397.38 0.00 0.00 AL~~2005-~~R 50.00 6.73215% 0.00 0.00 0.00 0.00 A-UR 50.00 6.73215% 0.00 0.00 0.00 0.00 15-B-~~1 ~~432,000.00~~Mortgage ~~6.19798% 427,290.78 2,206.95 0.00 0.00 15~~Pass-~~B-2~~Through ~~215~~Certificates,~~000.00~~ ~~6.19798%~~Series ~~212,656.29 1,098.37 0.00 0.00 15~~2005-~~B-3 161,000.00 6.19798% 159,244.95 822.50 0.00 0.00 30-B-~~1 5,015,000.00 6.73462% 5,000,945.29 28,066.21 0.00 0.00 30-B-2 414,000.00 6.73462% 412,839.75 2,316.93 0.00 0.00 30-B-3 310,000.00 6.73462% 309,131.21 1,734.90 0.00 0.00 HY-B-1 2,246,000.00 5.89629% 2,241,964.24 11,016.05 0.00 0.00 HY-B-2 339,000.00 5.89629% 338,390.86 1,662.71 0.00 0.00 HY-B-3 226,000.00 5.89629% 225,593.91 1,108.47 0.00 0.00 CB-4 427,000.00 6.35369% 425,102.24 2,250.81 0.00 0.00 CB-5 269,000.00 6.35369% 267,804.45 1,417.96 0.00 0.00 CB-6 435,575.02 6.35369% 433,639.15 2,296.01 0.00 0.00 Totals 428,145,675.02 2,108,164.29 0.00 0.00)

Interest Distribution Statement (continued) Remaining Ending Non-Supported Total Unpaid Certificate/ Interest Realized Interest Interest Notional Class Shortfall Losses (4) Distribution Shortfall Balance 1-A-1 0.00 0.00 1,039,177.69 0.00 180,985,449.98 2-A-1 0.00 0.00 514,042.74 0.00 97,174,006.95 3-A-1 0.00 0.00 234,995.22 0.00 46,351,438.79 4-A-1 0.00 0.00 237,553.39 0.00 45,700,298.34 4-A-2 0.00 0.00 26,397.38 0.00 5,078,302.44 AL-R 0.00 0.00 0.00 0.00 0.00 A-UR 0.00 0.00 0.00 0.00 0.00 15-B-1 0.00 0.00 2,206.95 0.00 424,902.43 15-B-2 0.00 0.00 1,098.37 0.00 211,467.64 15-B-3 0.00 0.00 822.50 0.00 158,354.84 30-B-1 0.00 0.00 28,066.21 0.00 4,993,826.39 30-B-2 0.00 0.00 2,316.93 0.00 412,252.07 30-B-3 0.00 0.00 1,734.90 0.00 308,691.16 HY-B-1 0.00 0.00 11,016.05 0.00 2,239,934.81 HY-B-2 0.00 0.00 1,662.71 0.00 338,084.55 HY-B-3 0.00 0.00 1,108.47 0.00 225,389.70 CB-4 0.00 0.00 2,250.81 0.00 424,141.11 CB-5 0.00 0.00 1,417.96 0.00 267,198.96 CB-6 0.00 0.00 2,296.01 0.00 432,658.71 Totals 0.00 0.00 2,108,164.29 0.00 (4) Amount Does Not Include Excess Special Hazard, Bankruptcy, or Fraud Losses Unless Otherwise Disclosed. Please Refer to the Prospectus Supplement for a Full Description.

MORTGAGE ASSET SECURITIZATION TRANSACTIONS, INC.
(Exact name of registrant as specified in its charter)
Delaware	333-106982	06-1204982
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)

1285 Avenue of the Americas New York, New York 10019
(Address of Principal Executive Offices) (Zip Code)

Registrant’s telephone number, including area code (212) 713-2000

~~Interest~~Check ~~Distribution~~the ~~Factors~~appropriate ~~Statement~~box ~~Beginning~~below ~~Payment~~if ofthe ~~Original~~Form ~~Current Certificate/ Current Unpaid Current Face Certificate Notional Accrued Interest Interest Class (5) Amount Rate Balance Interest Shortfall Shortfall 1~~8-~~A-1~~K ~~200,960,000.00~~filing ~~6.73462%~~is ~~921.40080454~~intended ~~5.17106733~~to ~~0.00000000~~simultaneously ~~0.00000000~~satisfy ~~2-A-1~~the ~~106,791,000.00~~filing ~~6.19798%~~obligation ~~931.95639595~~of ~~4.81353991~~the ~~0.00000000~~registrant ~~0.00000000~~under ~~3-A-1~~any ~~52,510,000.00~~of ~~5.87393%~~the ~~914.25970653~~following 4.47524700 0.00000000 0.00000000 4-A-1 51,655,000.00 5.91674% 932.71166218 4.59884600 0.00000000 0.00000000 4-A-2 5,740,000.00 5.91674% 932.71166202 4.59884669 0.00000000 0.00000000 AL-R 50.00 6.73215% 0.00000000 0.00000000 0.00000000 0.00000000 A-UR 50.00 6.73215% 0.00000000 0.00000000 0.00000000 0.00000000 15-B-1 432,000.00 6.19798% 989.09902778 5.10868056 0.00000000 0.00000000 15-B-2 215,000.00 6.19798% 989.09902326 5.10869767 0.00000000 0.00000000 15-B-3 161,000.00 6.19798% 989.09906832 5.10869565 0.00000000 0.00000000 30-B-1 5,015,000.00 6.73462% 997.19746560 5.59645264 0.00000000 0.00000000 30-B-2 414,000.00 6.73462% 997.19746377 5.59644928 0.00000000 0.00000000 30-B-3 310,000.00 6.73462% 997.19745161 5.59645161 0.00000000 0.00000000 HY-B-1 2,246,000.00 5.89629% 998.20313446 4.90474176 0.00000000 0.00000000 HY-B-2 339,000.00 5.89629% 998.20312684 4.90474926 0.00000000 0.00000000 HY-B-3 226,000.00 5.89629% 998.20314159 4.90473451 0.00000000 0.00000000 CB-4 427,000.00 6.35369% 995.55559719 5.27121780 0.00000000 0.00000000 CB-5 269,000.00 6.35369% 995.55557621 5.27122677 0.00000000 0.00000000 CB-6 435,575.02 6.35369% 995.55559913 5.27121597 0.00000000 0.00000000 (5) All Classes are per $1,000 denominationprovisions:

~~Interest~~[ ~~Distribution~~] ~~Factors~~Written ~~Statement~~communications ~~(continued)~~pursuant ~~Remaining~~to ~~Ending~~Rule ~~Non-Supported~~425 ~~Total~~under ~~Unpaid~~the ~~Certificate/~~Securities ~~Interest~~Act ~~Realized Interest Interest Notional Class Shortfall Losses~~ (6)17 ~~Distribution~~CFR ~~Shortfall Balance 1-A-1 0~~230.~~00000000~~425) ~~0.00000000~~[ ~~5.17106733~~] ~~0.00000000~~Soliciting ~~900.60434902~~material ~~2-A-1~~pursuant ~~0.00000000~~to ~~0.00000000~~Rule ~~4.81353991 0.00000000 909.94565975 3~~14a-~~A-1~~12 ~~0.00000000~~under ~~0.00000000~~the ~~4.47524700~~Exchange ~~0.00000000~~Act ~~882.71641192~~(17 ~~4-A-1~~CFR 0240.~~00000000 0.00000000 4.59884600 0.00000000 884.72167922 4~~14a-~~A-2~~12) ~~0.00000000~~[ ~~0.00000000~~] ~~4.59884669 0.00000000 884.72167944 AL~~Pre-Rcommencement ~~0.00000000~~communications ~~0.00000000~~pursuant ~~0.00000000~~to ~~0.00000000~~Rule ~~0.00000000 A~~14d-~~UR 0.00000000 0.00000000 0.00000000 0.00000000 0.00000000 15-B-1 0.00000000 0.00000000 5.10868056 0.00000000 983.57043981 15-B-~~2(d) ~~0.00000000~~under ~~0.00000000~~the ~~5.10869767~~Exchange ~~0.00000000~~Act ~~983.57041860~~(17 ~~15-B-3~~CFR 0240.~~00000000 0.00000000 5.10869565 0.00000000 983.57043478 30~~14d-~~B-1 0.00000000 0.00000000 5.59645264 0.00000000 995.77794417 30-B-~~2(b)) ~~0.00000000~~[ ~~0.00000000~~] ~~5.59644928 0.00000000 995.77794686 30~~Pre-~~B-3~~commencement ~~0.00000000~~communications ~~0.00000000~~pursuant ~~5.59645161~~to ~~0.00000000~~Rule ~~995.77793548 HY~~13e-~~B-1 0.00000000 0.00000000~~ 4~~.90474176~~(c) ~~0.00000000~~under ~~997.29955922~~the ~~HY-B-2~~Exchange ~~0.00000000~~Act ~~0.00000000~~(17 ~~4.90474926~~CFR 0240.~~00000000 997.29955752 HY~~13e-~~B-3 0.00000000 0.00000000~~ 4.90473451 0.00000000 997.29955752 CB-4 0.00000000 0.00000000 5.27121780 0.00000000 993.30470726 CB-5 0.00000000 0.00000000 5.27122677 0.00000000 993.30468401 CB-6 0.00000000 0.00000000 5.27121597 0.00000000 993.30468951 (6c) ~~Amount Does Not Include Excess Special Hazard, Bankruptcy,or Fraud Losses Unless Otherwise Disclosed. Please Refer to the Prospectus Supplement for a Full Description.~~)

~~CERTIFICATEHOLDER~~Item ~~ACCOUNT STATEMENT CERTIFICATE ACCOUNT Beginning Balance 0~~8.~~00 Deposits Payments of Interest and Principal 13,156,668~~01.~~58 Liquidations, Insurance Proceeds, Reserve Funds 0.00 Proceeds from Repurchased Loans 0.00~~ Other Amounts (Servicer Advances) 0.00 Realized Loss (Gains, Subsequent Expenses & Recoveries) 0.00 Prepayment Penalties 0.00 Total Deposits 13,156,668.58 Withdrawals Reimbursement for Servicer Advances 0.00 Payment of Service Fee 90,275.84 Payment of Interest and Principal 13,066,392.74 Total Withdrawals (Pool Distribution Amount) 13,156,668.58 Ending Balance 0.00Events

~~PREPAYMENT/CURTAILMENT~~Master ~~INTEREST~~Asset ~~SHORTFALL~~Securitization ~~Total~~Transactions, ~~Prepayment/Curtailment~~Inc. ~~Interest~~(the ~~Shortfall~~“Company”) ~~0.00~~entered into a Pooling and Servicing ~~Fee~~Agreement ~~Support~~dated 0as of March 1, 2005 (the “Agreement”) among the Company, in its capacity as depositor (in such capacity, the “Depositor”), Wells Fargo Bank, N.00A., ~~Non-Supported~~as ~~Prepayment/Curtailment~~master ~~Interest~~servicer ~~Shortfall~~(in 0such capacity, the “Master Servicer”), as trust administrator (in such capacity, the “Trust Administrator”) and as a custodian (in such capacity, a “Custodian”) and U.00S. Bank National Association, as trustee (in such capacity, the “Trustee”) and as a custodian (in such capacity, a “Custodian”). The Certificates were issued on March 30, 2005. The Pooling and Servicing Agreement is annexed hereto as Exhibit 99.1.

~~SERVICING~~Item ~~FEES Gross Servicing Fee 89,950~~9.~~47 LPMI 325~~01.37 Financial ~~Supported~~Statements ~~Prepayment/Curtailment~~and ~~Interest Shortfall 0~~Exhibits.~~00 Net Servicing Fee 90,275.84~~

LOAN STATUS STRATIFICATION/CREDIT ENHANCEMENT STATEMENT DELINQUENT BANKRUPTCY FORECLOSURE REO Total No of Loans No of Loans No of Loans No of Loans No of Loans Principal Balance Principal Balance Principal Balance Principal Balance Principal Balance 0-29 Days 5 3 0 8 1,290,910.16 560,187.96 0.00 1,851,098.12 30 Days 52 1 0 0 53 12,891,764.62 276,460.78 0.00 0.00 13,168,225.40 60 Days 7 1 3 0 11 2,719,610.87 308,010.46 544,543.15 0.00 3,572,164.48 90 Days 4 0 0 0 4 714,119.73 0.00 0.00 0.00 714,119.73 120 Days 0 0 2 0 2 0.00 0.00 392,013.27 0.00 392,013.27 150 Days 1 0 2 0 3 281,758.32 0.00 377,441.16 0.00 659,199.48 180+ Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 Totals 64 7 10 0 81 16,607,253.54 1,875,381.40 1,874,185.54 0.00 20,356,820.48 No of Loans No of Loans No of Loans No of Loans No of Loans Principal Balance Principal Balance Principal Balance Principal Balance Principal Balance 0-29 Days 0.428816% 0.257290% 0.000000% 0.686106% 0.334025% 0.144949% 0.000000% 0.478974% 30 Days 4.459691% 0.085763% 0.000000% 0.000000% 4.545455% 3.335763% 0.071535% 0.000000% 0.000000% 3.407298% 60 Days 0.600343% 0.085763% 0.257290% 0.000000% 0.943396% 0.703703% 0.079698% 0.140901% 0.000000% 0.924303% 90 Days 0.343053% 0.000000% 0.000000% 0.000000% 0.343053% 0.184780% 0.000000% 0.000000% 0.000000% 0.184780% 120 Days 0.000000% 0.000000% 0.171527% 0.000000% 0.171527% 0.000000% 0.000000% 0.101434% 0.000000% 0.101434% 150 Days 0.085763% 0.000000% 0.171527% 0.000000% 0.257290% 0.072905% 0.000000% 0.097663% 0.000000% 0.170569% 180+ Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% Totals 5.488851% 0.600343% 0.857633% 0.000000% 6.946827% 4.297152% 0.485258% 0.484948% 0.000000% 5.267358%(a)

~~DELINQUENT~~Not BANKRUPTCY FORECLOSURE REO Total 1 No of Loans No of Loans No of Loans No of Loans No of Loans Principal Balance Principal Balance Principal Balance Principal Balance Principal Balance 0-29 Days 2 3 0 5 263,431applicable.11 560,187.96 0.00 823,619.07 30 Days 40 1 0 0 41 9,334,813.08 276,460.78 0.00 0.00 9,611,273.86 60 Days 7 1 3 0 11 2,719,610.87 308,010.46 544,543.15 0.00 3,572,164.48 90 Days 3 0 0 0 3 665,354.96 0.00 0.00 0.00 665,354.96 120 Days 0 0 1 0 1 0.00 0.00 103,473.26 0.00 103,473.26 150 Days 1 0 1 0 2 281,758.32 0.00 217,441.16 0.00 499,199.48 180+ Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 Totals 51 4 8 0 63 13,001,537.23 847,902.35 1,425,645.53 0.00 15,275,085.11 0-29 Days 0.369004% 0.553506% 0.000000% 0.922509% 0.140518% 0.298813% 0.000000% 0.439332% 30 Days 7.380074% 0.184502% 0.000000% 0.000000% 7.564576% 4.979342% 0.147469% 0.000000% 0.000000% 5.126811% 60 Days 1.291513% 0.184502% 0.553506% 0.000000% 2.029520% 1.450685% 0.164298% 0.290468% 0.000000% 1.905451% 90 Days 0.553506% 0.000000% 0.000000% 0.000000% 0.553506% 0.354911% 0.000000% 0.000000% 0.000000% 0.354911% 120 Days 0.000000% 0.000000% 0.184502% 0.000000% 0.184502% 0.000000% 0.000000% 0.055194% 0.000000% 0.055194% 150 Days 0.184502% 0.000000% 0.184502% 0.000000% 0.369004% 0.150295% 0.000000% 0.115987% 0.000000% 0.266281% 180+ Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% Totals 9.409594% 0.738007% 1.476015% 0.000000% 11.623616% 6.935233% 0.452285% 0.760463% 0.000000% 8.147981% DELINQUENT BANKRUPTCY FORECLOSURE REO Total 2 No of Loans No of Loans No of Loans No of Loans No of Loans Principal Balance Principal Balance Principal Balance Principal Balance Principal Balance 0-29 Days 0 0 0 0 0.00 0.00 0.00 0.00 30 Days 4 0 0 0 4 472,496.57 0.00 0.00 0.00 472,496.57 60 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 90 Days 1 0 0 0 1 48,764.77 0.00 0.00 0.00 48,764.77 120 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 150 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 180+ Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 Totals 5 0 0 0 5 521,261.34 0.00 0.00 0.00 521,261.34 0-29 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 30 Days 1.444043% 0.000000% 0.000000% 0.000000% 1.444043% 0.478930% 0.000000% 0.000000% 0.000000% 0.478930% 60 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 90 Days 0.361011% 0.000000% 0.000000% 0.000000% 0.361011% 0.049429% 0.000000% 0.000000% 0.000000% 0.049429% 120 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 150 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 180+ Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% Totals 1.805054% 0.000000% 0.000000% 0.000000% 1.805054% 0.528359% 0.000000% 0.000000% 0.000000% 0.528359% DELINQUENT BANKRUPTCY FORECLOSURE REO Total 3 No of Loans No of Loans No of Loans No of Loans No of Loans Principal Balance Principal Balance Principal Balance Principal Balance Principal Balance 0-29 Days 1 0 0 1 117,697.02 0.00 0.00 117,697.02 30 Days 4 0 0 0 4 997,341.54 0.00 0.00 0.00 997,341.54 60 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 90 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 120 Days 0 0 1 0 1 0.00 0.00 288,540.01 0.00 288,540.01 150 Days 0 0 1 0 1 0.00 0.00 160,000.00 0.00 160,000.00 180+ Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 Totals 4 1 2 0 7 997,341.54 117,697.02 448,540.01 0.00 1,563,578.57 0-29 Days 0.425532% 0.000000% 0.000000% 0.425532% 0.245786% 0.000000% 0.000000% 0.245786% 30 Days 1.702128% 0.000000% 0.000000% 0.000000% 1.702128% 2.082739% 0.000000% 0.000000% 0.000000% 2.082739% 60 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 90 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 120 Days 0.000000% 0.000000% 0.425532% 0.000000% 0.425532% 0.000000% 0.000000% 0.602555% 0.000000% 0.602555% 150 Days 0.000000% 0.000000% 0.425532% 0.000000% 0.425532% 0.000000% 0.000000% 0.334126% 0.000000% 0.334126% 180+ Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% Totals 1.702128% 0.425532% 0.851064% 0.000000% 2.978723% 2.082739% 0.245786% 0.936682% 0.000000% 3.265206% DELINQUENT BANKRUPTCY FORECLOSURE REO Total 4 No of Loans No of Loans No of Loans No of Loans No of Loans Principal Balance Principal Balance Principal Balance Principal Balance Principal Balance 0-29 Days 2 0 0 2 909,782.03 0.00 0.00 909,782.03 30 Days 4 0 0 0 4 2,087,113.43 0.00 0.00 0.00 2,087,113.43 60 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 90 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 120 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 150 Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 180+ Days 0 0 0 0 0 0.00 0.00 0.00 0.00 0.00 Totals 4 2 0 0 6 2,087,113.43 909,782.03 0.00 0.00 2,996,895.46 0-29 Days 1.785714% 0.000000% 0.000000% 1.785714% 1.734316% 0.000000% 0.000000% 1.734316% 30 Days 3.571429% 0.000000% 0.000000% 0.000000% 3.571429% 3.978661% 0.000000% 0.000000% 0.000000% 3.978661% 60 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 90 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 120 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 150 Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 180+ Days 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% 0.000000% Totals 3.571429% 1.785714% 0.000000% 0.000000% 5.357143% 3.978661% 1.734316% 0.000000% 0.000000% 5.712977%

~~OTHER INFORMATION Current Period Class A Insufficient Funds 0.00 Principal Balance of Contaminated Properties 0.00 Periodic Advance 136,978.47~~(b)

~~COLLATERAL~~Not ~~STATEMENT Collateral Description Mixed Fixed & Arm Weighted Average Gross Coupon 6~~applicable.652101% Weighted Average Net Coupon 6.379994% Weighted Average Pass-Through Rate 6.379010% Weighted Average Maturity(Stepdown Calculation) 266 Beginning Scheduled Collateral Loan Count 1,194 Number Of Loans Paid In Full 28 Ending Scheduled Collateral Loan Count 1,166 Beginning Scheduled Collateral Balance 396,684,627.33 Ending Scheduled Collateral Balance 385,726,398.87 Ending Actual Collateral Balance at 31-May-2005 386,471,183.25 Monthly P&I Constant 3,128,437.55 Special Servicing Fee 0.00 Prepayment Penalties 0.00 Realized Loss Amount 0.00 Cumulative Realized Loss 0.00 Scheduled Principal 929,449.06 Unscheduled Principal 10,028,779.40

Group Level Collateral Statement Group 1 2 3 Collateral Description Fixed 30 Year Fixed 15 Year Mixed ARM Weighted Average Coupon Rate 6.976655 6.453115 6.227087 Weighted Average Net Rate 6.736475 6.198326 5.887222 Weighted Average Maturity 304 136 314 Beginning Loan Count 552 281 244 Loans Paid In Full 10 4 9 Ending Loan Count 542 277 235 Beginning Scheduled Balance 191,405,569.88 100,592,482.09 49,510,760.88 Ending Scheduled Balance 187,217,430.24 98,235,964.34 47,852,988.58 Record Date 05/31/2005 05/31/2005 05/31/2005 Principal And Interest Constant 1,385,276.92 1,103,211.32 304,158.31 Scheduled Principal 272,468.08 562,265.59 47,235.12 Unscheduled Principal 3,915,671.56 1,794,252.16 1,610,537.18 Scheduled Interest 1,112,808.84 540,945.73 256,923.19 Servicing Fees 38,309.85 21,358.26 14,022.48 Master Servicing Fees 0.00 0.00 0.00 Trustee Fee 0.00 0.00 0.00 FRY Amount 0.00 0.00 0.00 Special Hazard Fee 0.00 0.00 0.00 Other Fee 296.37 29.00 0.00 Pool Insurance Fee 0.00 0.00 0.00 Spread 1 0.00 0.00 0.00 Spread 2 0.00 0.00 0.00 Spread 3 0.00 0.00 0.00 Net Interest 1,074,202.62 519,558.47 242,900.71 Realized Loss Amount 0.00 0.00 0.00 Cumulative Realized Loss 0.00 0.00 0.00 Percentage of Cumulative Losses 0.0000 0.0000 0.0000 Prepayment Penalties 0.00 0.00 0.00 Special Servicing Fee 0.00 0.00 0.00 Pass-Through Rate 6.734617 6.197980 5.887222(c)

Group Level Collateral Statement Group 4 Total Collateral Description Mixed ARM Mixed Fixed & Arm Weighted Average Coupon Rate 6.270372 6.652101 Weighted Average Net Rate 5.916743 6.379994 Weighted Average Maturity 321 266 Beginning Loan Count 117 1,194 Loans Paid In Full 5 28 Ending Loan Count 112 1,166 Beginning Scheduled Balance 55,175,814.48 396,684,627.33 Ending scheduled Balance 52,420,015.71 385,726,398.87 Record Date 05/31/2005 05/31/2005 Principal And Interest Constant 335,791.00 3,128,437.55 Scheduled Principal 47,480.27 929,449.06 Unscheduled Principal 2,708,318.50 10,028,779.40 Scheduled Interest 288,310.73 2,198,988.49 Servicing Fees 16,259.82 89,950.41 Master Servicing Fees 0.00 0.00 Trustee Fee 0.00 0.00 FRY Amount 0.00 0.00 Special Hazard Fee 0.00 0.00 Other Fee 0.00 325.37 Pool Insurance Fee 0.00 0.00 Spread 1 0.00 0.00 Spread 2 0.00 0.00 Spread 3 0.00 0.00 Net Interest 272,050.91 2,108,712.71 Realized Loss Amount 0.00 0.00 Cumulative Realized Loss 0.00 0.00 Percentage of Cumulative Losses 0.0000 0.0000 Prepayment Penalties 0.00 0.00 Special Servicing Fee 0.00 0.00 Pass-Through Rate 5.916743 6.379010Exhibits:

~~Miscellaneous Reporting Group 1 Senior Prepayment % 100~~99.~~000000% Senior % 96.739455% Subordinate % 3.260545% Group 2 Senior Prepayment % 100.000000% Senior % 98.938363% Subordinate %~~ 1~~.061637% Group 3 Senior Prepayment % 100.000000% Senior % 96.964329% Subordinate % 3.035671%~~

~~Miscellaneous~~ The ~~Reporting~~Pooling ~~Group~~and 4Servicing ~~Senior~~Agreement ~~Prepayment~~dated %as ~~100.000000%~~of ~~Senior~~March %1, ~~97.022557%~~2005, ~~Subordinate~~by %and 2among the Company, the Master Servicer, the Trust Administrator, the Custodians and the Trustee.~~977443%~~

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

MORTGAGE ASSET SECURITIZATION

TRANSACTIONS, INC.

By: /s/ Sameer Tikoo

Name: Sameer Tikoo

Title: Associate Director

By: /s/ Julie Park

Name: Julie Park

Title: Associate Director

Dated: July 14, 2005

Exhibit Index

Exhibit

Page

99.1

Pooling and Servicing Agreement dated as of March 1, 2005,

by and among the Company, the Master Servicer, the Trust Administrator,
the Custodians and the Trustee.

Filing Compare · MASTR Seasoned Securitization Trust 2005-1