{"cik":"0001328720","entityType":"operating","sic":"6189","sicDescription":"Asset-Backed Securities","ownerOrg":null,"insiderTransactionForOwnerExists":0,"insiderTransactionForIssuerExists":0,"name":"MASTR Asset Securitization Trust 2005-1","tickers":[],"exchanges":[],"ein":null,"lei":null,"description":"","website":"","investorWebsite":"","category":"","fiscalYearEnd":"1231","stateOfIncorporation":"DE","stateOfIncorporationDescription":"DE","addresses":{"mailing":{"street1":"1285 AVENUE OF THE AMERICAS","street2":null,"city":"NEW YORK","stateOrCountry":"NY","zipCode":"10019","stateOrCountryDescription":"NY","isForeignLocation":null,"foreignStateTerritory":null,"country":null,"countryCode":null},"business":{"street1":"1285 AVE OF THE AMERICAS","street2":null,"city":"NEW YORK","stateOrCountry":"NY","zipCode":"10019","stateOrCountryDescription":"NY","isForeignLocation":null,"foreignStateTerritory":null,"country":null,"countryCode":null}},"phone":"2127132000","flags":"","formerNames":[],"filings":{"recent":{"accessionNumber":["0001056404-06-001662","0001056404-06-000569","0001056404-06-000169","0001056404-05-004371","0001056404-05-003627","0001056404-05-003278","0001162318-05-000751","0001056404-05-003077","0001056404-05-002754","0001056404-05-002540","0001056404-05-002467","0000950136-05-003139"],"filingDate":["2006-03-31","2006-01-26","2006-01-05","2005-12-06","2005-10-31","2005-09-29","2005-09-09","2005-09-02","2005-08-02","2005-07-21","2005-07-05","2005-05-27"],"reportDate":["2005-12-31","","2005-12-27","2005-11-25","2005-10-25","2005-09-26","2005-09-09","2005-08-25","2005-07-25","2005-06-27","2005-06-27",""],"acceptanceDateTime":["2006-03-31T17:50:15.000Z","2006-01-26T14:47:06.000Z","2006-01-05T12:34:43.000Z","2005-12-06T20:41:20.000Z","2005-10-31T17:06:42.000Z","2005-09-29T19:07:03.000Z","2005-09-09T19:52:18.000Z","2005-09-02T15:15:40.000Z","2005-08-02T16:04:32.000Z","2005-07-21T12:26:21.000Z","2005-07-05T16:49:27.000Z","2005-05-27T20:26:00.000Z"],"act":["34","34","34","34","34","34","34","34","34","34","34","33"],"form":["10-K","15-15D","8-K","8-K","8-K","8-K","8-K","8-K","8-K","8-K/A","8-K","424B5"],"fileNumber":["333-106982-70","333-106982-70","333-106982-70","333-106982-70","333-106982-70","333-106982-70","333-106982-70","333-106982-70","333-106982-70","333-106982-70","333-106982-70","333-106982-70"],"filmNumber":["06726902","06551740","06510472","051247046","051165464","051111104","051077789","051066538","05990751","05964999","05935680","05864276"],"items":["","","8.01,9.01","8.01,9.01","8.01,9.01","8.01,9.01","8.01,9.01","8.01,9.01","8.01,9.01","8.01,9.01","8.01,9.01",""],"core_type":["10-K","15-15D","8-K","8-K","8-K","8-K","8-K","8-K","8-K","8-K/A","8-K","424B5"],"size":[162294,4218,107990,99835,98462,100714,971046,99686,98658,84315,83900,1139615],"isXBRL":[0,0,0,0,0,0,0,0,0,0,0,0],"isInlineXBRL":[0,0,0,0,0,0,0,0,0,0,0,0],"isXBRLNumeric":[null,null,null,null,null,null,null,null,null,null,null,null],"primaryDocument":["mst05001_10k-2005.txt","mst05001_15-2005.txt","mst05001_8k-200512.txt","mst05001_8k-200511.txt","mst05001_10510.txt","mst05001_10509.txt","m400form8k.htm","mst05001_10508.txt","mst05001_10507.txt","mst05001_10506.txt","mst05001_10506.txt","file001.htm"],"primaryDocDescription":["","","","","","","CURRENT REPORT","","","","","FORM 424B5"]},"files":[]}}