Cloning of a novel gene,<Emphasis Type="Italic">Cymg1</Emphasis>, related to family 2 cystatins and expressed at specific stages of mouse testis development |
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Authors: | Y?Xiang D?S?Nie Email author" target="_blank">G?X?LuEmail author |
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Institution: | (1) Human Reproductive and Stem Cell Engineering Institute, Central South University, 410078 Changsha, People’s Republic of China |
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Abstract: | We have cloned a novel gene,Cymg1 (GenBank accession number AY600990), from a mouse testis cDNA library.Cymg1 is located in 2G3 of mouse chromosome 2. The cDNA includes an open reading frame that encodes 141 amino acid residues. The
encoded polypeptide has a cysteine protease inhibitor domain found in the family 2 cystatins but lacks critical consensus
sites important for cysteine protease inhibition. These characteristics are seen in the proteins of the CRES subfamily of
the family 2 cystatins which are expressed specifically in the reproductive tract. CYMG1 protein shows 44% identity with mouse
CRES and 30% identity with mouse cystatin C. Northern blot analysis showed that theCymg1 gene was specifically expressed in adult mouse testis. RT-PCR also showed thatCymg1 was expressed in testis and spermatogonial cells.Cymg1 expression level varied in the different developmental stages of mouse testis, and were coincidental with spermatogenesis
and sex maturation. These results indicate thatCymg1 may play important roles in mouse spermatogenesis and sex maturation |
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Keywords: | cystatins gene cloning testis spermatogenesis sex maturation |
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