4.7 Article

Succinyl-CoA:3-ketoacid CoA transferase (SCOT):: Cloning of the human SCOT gene, tertiary structural modeling of the human SCOT monomer, and characterization of three pathogenic mutations

Journal

GENOMICS
Volume 68, Issue 2, Pages 144-151

Publisher

ACADEMIC PRESS INC
DOI: 10.1006/geno.2000.6282

Keywords

-

Ask authors/readers for more resources

The activity of succinyl-CoA:3-ketoacid CoA transferase (SCOT; locus symbol OXCT; EC 2.8.3.5) is the main determinant of the ketolytic capacity of tissues. Hereditary SCOT deficiency causes episodic ketoacidosis. Here we describe the human SCOT gene, which spans more than 100 kb and contains 17 exons, on chromosome 5p13. We report pathogenic missense mutations in three SCOT-deficient patients designated GS04, 05, and 06, GS04 is a G219E/G324E compound; GS05 is a V221M homozygote, and GS06 is a G324E homozygote. We constructed a tertiary structural model of human SCOT by homology modeling based on the known structure of Acidaminococcus fermentans glutaconate CoA transferase. The model predicts that V221 and G219 are on the dimerizing surface, whereas G324 is near the active site. SCOT activity was reduced to a comparable degree in all three patients, but in a transient expression assay in SCOT-deficient fibroblasts, cDNAs containing G219E and G324E produced no detectable activity, whereas V221M constructs yielded similar to 10% of the control peptide level and detectable specific activity, Interestingly, GS05 had the mildest clinical course reported to date and detectable levels of SCOT protein in fibroblasts. (C) 2000 Academic Press.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available