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Proc Natl Acad Sci U S A. 1995 Apr 25;92(9):4011-5.

Human acetyl-CoA carboxylase: characterization, molecular cloning, and evidence for two isoforms.

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  • 1Verna and Marrs McLean Department of Biochemistry, Baylor College of Medicine, Houston, TX 77030, USA.


We have cloned and sequenced the cDNA coding for human HepG2 acetyl-CoA carboxylase (ACC; EC The sequence has an open reading frame of 7038 bp that encode 2346 amino acids (M(r), 264,737). The C-terminal 2.6-kb sequence is very different from that recently reported for human ACC (Ha, J., Daniel, S., Kong, I.-S., Park, C.-K., Tae, H.-J. & Kim, K.-H. [1994] Eur. J. Biochem. 219, 297-306). Northern blot analysis revealed that the ACC mRNA is approximately 10 kb in size and that its level varies among the tissues tested. Evidence is presented to show that the human ACC gene is 200-480 kbp in size and maps to chromosome 17q12. We also provide evidence for the presence of another ACC-like gene with similarly sized mRNA but tissue-specific expression different from that of the ACC gene reported herein. That this second ACC-like gene encodes the 280-kDa carboxylase is not ruled out.

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