Structural highlights
Function
[GLSK_HUMAN] Catalyzes the first reaction in the primary pathway for the renal catabolism of glutamine. Plays a role in maintaining acid-base homeostasis. Regulates the levels of the neurotransmitter glutamate in the brain. Isoform 2 lacks catalytic activity.
Publication Abstract from PubMed
Glutaminase (GLS1/2) catalyzes the conversion of l-glutamine to l-glutamate and ammonia. The level of a splice variant of GLS1 (GAC) is elevated in certain cancers, and GAC is specifically inhibited by bis-2-(5-phenylacetimido-1,2,4,thiadiazol-2-yl)ethyl sulfide (BPTES). We report here the first full-length crystal structure of GAC in the presence and absence of BPTES molecules. Two BPTES molecules bind at an interface region of the GAC tetramer in a manner that appears to lock the GAC tetramer into a nonproductive conformation. The importance of these loops with regard to overall enzymatic activity of the tetramer was revealed by a series of GAC point mutants designed to create a BPTES resistant GAC.
Full-Length Human Glutaminase in Complex with an Allosteric Inhibitor.,Delabarre B, Gross S, Fang C, Gao Y, Jha A, Jiang F, Song J J, Wei W, Hurov JB Biochemistry. 2011 Nov 18. PMID:22049910[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Delabarre B, Gross S, Fang C, Gao Y, Jha A, Jiang F, Song J J, Wei W, Hurov JB. Full-Length Human Glutaminase in Complex with an Allosteric Inhibitor. Biochemistry. 2011 Nov 18. PMID:22049910 doi:10.1021/bi201613d
