Identification and characterization of hamster stearoyl-CoA desaturase isoforms.
Stearoyl-CoA desaturase (SCD) catalyzes the formation of monounsaturated fatty acids from saturated fatty acids. It plays a key role in lipid metabolism and energy expenditure in mammals. In mice, four SCD isoforms (SCD1-4) have been identified. Here we report the identification of cDNA sequences corresponding to SCD1, SCD2 and SCD3 of golden hamster. The deduced amino acid sequences of these hamster SCD (hmSCD) isoforms display a high degree of homologies to their mouse counterparts (mouse SCD). Polyclonal antibodies specific to rodent SCDs detected proteins of predicted size in the human embryonic kidney 293 cells transfected with hmSCD cDNAs. Microsome fractions prepared from these cells also displayed increased SCD activity versus cells transfected with vector alone. Real-time reverse transcription-polymerase chain reaction analysis revealed the highest expression of hmSCD1 in liver and adipose tissue, while the highest hmSCD2 expression was detected in the brain. Very low levels of hmSCD3 mRNA can be detected in the tissues tested. This report is the first description of three SCD isoforms in the hamster and will provide useful tools in the further study of fatty acids metabolism in this species.
Wang
Jian
J
Cardiovascular and Diabetes Drug Discovery, Lilly Research Labs, Lilly Corporate Center, Indianapolis, IN 46285, USA. jyw@lilly.com
Yu
Lan
L
Wang
He
H
Gao
Yunling
Y
Schrementi
James P
JP
Porter
Regina K
RK
Yurek
David A
DA
Kuo
Mingshang
M
Suen
Chen-Shian
CS
Cao
Guoqing
G
Bean
James S
JS
Kauffman
Raymond F
RF
Qian
Yuewei
Y
D052436:Adipose Tissue, White / Q000201:enzymology / Q000378:metabolism*; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D001921:Brain / Q000201:enzymology / Q000378:metabolism*; D002460:Cell Line; D003001:Cloning, Molecular; D006224:Cricetinae; D005227:Fatty Acids / Q000378:metabolism; D006801:Humans; D007527:Isoenzymes / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D050356:Lipid Metabolism; D008099:Liver / Q000201:enzymology / Q000378:metabolism*; D008297:Male; D008647:Mesocricetus; D008969:Molecular Sequence Data; D016415:Sequence Alignment; D013230:Stearoyl-CoA Desaturase / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*
D005227:Fatty Acids; D007527:Isoenzymes; D013230:Stearoyl-CoA Desaturase