Characterization of a novel testicular form of human hormone-sensitive lipase.
Hormone-sensitive lipase (HSL) is an esterase and lipase, which are essential for spermatogenesis. Two HSL mRNAs are expressed in human testis. A long form is encoded by a testis-specific exon and nine exons common to testis and adipocyte HSL. Here we show that the short-form 3.3-kb mRNA possesses a unique 5' end that is transcribed from a novel testis-specific exon. The corresponding protein is similar to the 775-amino-acid-long adipocyte HSL. Immunohistochemistry experiments on human testis sections revealed that the long form is strictly expressed in haploid germ cells whereas the short form is expressed in interstitial and tubular somatic cells as well as premeiotic germ cells.
Mairal
Aline
A
INSERM Unit 317, Institut Louis Bugnard, Université Paul Sabatier, Hôpital Rangueil, Toulouse, France.
Melaine
Nathalie
N
Laurell
Henrik
H
Grober
Jacques
J
Holst
Lena Stenson
LS
Guillaudeux
Thierry
T
Holm
Cecilia
C
Jégou
Bernard
B
Langin
Dominique
D
D001483:Base Sequence; D003001:Cloning, Molecular; D005091:Exons; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008954:Models, Biological; D008969:Molecular Sequence Data; D020033:Protein Isoforms / Q000096:biosynthesis / Q000235:genetics; D012333:RNA, Messenger / Q000096:biosynthesis; D013091:Spermatogenesis; D002787:Sterol Esterase / Q000096:biosynthesis / Q000235:genetics* / Q000276:immunology; D013737:Testis / Q000201:enzymology*; D014018:Tissue Distribution
D020033:Protein Isoforms; D012333:RNA, Messenger; D002787:Sterol Esterase