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"Identification and characterization of two forms of mouse MUTYH proteins encoded by alternatively spliced transcripts." |
Ichinoe A, Behmanesh M, Tominaga Y, Ushijima Y, Hirano S, Sakai Y, Tsuchimoto D, Sakumi K, Wake N, Nakabeppu Y |
Published Jan. 1, 2004 in Nucleic Acids Res volume 32 .
Pubmed ID: 14742662
Abstract:
| There are three types of mouse Mutyh mRNAs (type a, b and c) generated by alternative splicing, and type b mRNA is a major form among the three in most of the tissues examined. The level of type c mRNA is relatively high in brain. Type a and b mRNAs were expected to encode 57.7 kDa protein (MUTYHalpha), while type c mRNA had a partly different open reading frame encoding a 50.2 kDa protein (MUTYHbeta). An in vitro translation of type b and c mRNAs produced a 50 kDa MUTYHalpha and 47 kDa MUTYHbeta, respectively. MUTYHalpha and MUTYHbeta were detected in wild-type embryonic stem (ES) cells or thymocytes prepared from wild-type mice, but neither MUTYH-null ES cells nor thymocytes prepared from MUTYH-null mice. Both MUTYHalpha and MUTYHbeta were mainly localized in the nuclei and some in mitochondria in wild-type ES cells. Recombinant MUTYHalpha and beta were expressed as fusion proteins with thioredoxin in Escherichia coli, but only MUTYHalpha was partly soluble and thus could be purified. Recombinant MUTYHalpha possessed DNA glycosylase activities to excise adenine opposite 8-oxoguanine and guanine but not AP lyase activity. |
This publication refers to following REPAIRtoire entries:
| Proteins |
Last modification of this entry: Oct. 6, 2010
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