Rapid
Identification of Human Testis Spermatocyte Apoptosis-related Gene, TSARG,
by Nested PCR and Draft Human Genome Searching
LIU Shang-Feng, LI Lu-Yun, FU Jun-Jiang,
LIU Gang, XING Xiao-Wei, LU Guang-Xiu*
( Human Reproductive Engineering Institue, Central South University Xiangya
Medical School, Changsha 410078, China )
Abstract Cloning
apoptosis-related novel genes is a key to further understanding of apoptosis
mechanism and the biology process of germ cells, and is of momentous
significance on clarifying physiological and pathological process of
spermatogenesis.To rapidly attain human novel gene full-length cDNA sequence,
the gene-specific primers and the vector-specific primers were designed for
nested PCR, and draft human genome searching was performed to rapidly identify
the TSARG2 (GenBank accession number AY040204) 5' end from a human
testis cDNA library, by using a cDNA fragment (GenBank accession number
BE644542) as an electronic probe,which was significantly changed in
cryptorchidism and represented a novel gene. Furthermore, a mouse homologue of
this gene was identified (GenBank accession number AF395083) by lab on-line.TSARG2
with a 1 233 bp length was composed of 6 exons and spanned about 115 kb of
genomic DNA,The putative protein encoded by this gene was 305 amino acid with a
theoretical molecular weight of 34 751 dalton and did not share significant
homology with any known protein in databases.TSARG2 was expressed in
many tissues and mapped to chromosome 4q33¡ª34.1 by database analyses.Therefore,
we propose that nested-PCR and draft human genome searching are rapid, sensitive,
accurate and efficient method for isolating gene 5' end, even full-length gene
from cDNA library.
Key words gene cloning; nested PCR; draft human genome
searching; testis; apoptosis
*Corresponding author£ºTel, 86-731-4373187;
Fax, 86-731-4497661; e-mail, [email protected]