期刊
BIOCHIMICA ET BIOPHYSICA ACTA-GENE STRUCTURE AND EXPRESSION
卷 1520, 期 1, 页码 1-6出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0167-4781(01)00237-8
关键词
alpha-crystallin; heat shock protein; spermatogenesis; in situ hybridization; gene expression
Using search profiles based on the conserved alpha -crystallin domain that is characteristic for small heat shock proteins (sHsps), we traced two new human sHsps. One of these, being the eighth known human sHsp and thus named HspB8, was recently described as a serine-threonine protein kinase (H11), but not identified as an sHsp (C.C. Smith, Y.X. Yu, M. Kulka, L. Aurelian, J. Biol. Chem. 275 (2000)). Northern blotting showed that HspB8/H11 is predominantly transcribed in skeletal muscle and heart, like most other sHsps. The other, named HspB9, is specifically expressed in testis, notably in the spermatogenic cells from late pachytene spermatocyte stage till elongate spermatid stage. While mammalian sHsps are generally highly conserved, mouse HspB9 shows 38% sequence difference with human HspB9, which may confirm its sex-related role. (C) 2001 Elsevier Science B.V. All rights reserved.
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