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STRUCTURE OF THE GAF DOMAINSTRUCTURE OF THE GAF DOMAIN
Structural highlights
FunctionFRMSR_YEAST Catalyzes the reversible oxidation-reduction of the R-enantiomer of free methionine sulfoxide to methionine. Does not act on S-enantiomer of free methionine sulfoxide or R-enantiomer of dabsylated methionine sulfoxide. Involved in protection against oxidative stress.[1] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedGAF domains are ubiquitous motifs present in cyclic GMP (cGMP)-regulated cyclic nucleotide phosphodiesterases, certain adenylyl cyclases, the bacterial transcription factor FhlA, and hundreds of other signaling and sensory proteins from all three kingdoms of life. The crystal structure of the Saccharomyces cerevisiae YKG9 protein was determined at 1.9 A resolution. The structure revealed a fold that resembles the PAS domain, another ubiquitous signaling and sensory transducer. YKG9 does not bind cGMP, but the isolated first GAF domain of phosphodiesterase 5 binds with K:(d) = 650 nM. The cGMP binding site of the phosphodiesterase GAF domain was identified by homology modeling and site-directed mutagenesis, and consists of conserved Arg, Asn, Lys and Asp residues. The structural and binding studies taken together show that the cGMP binding GAF domains form a new class of cyclic nucleotide receptors distinct from the regulatory domains of cyclic nucleotide-regulated protein kinases and ion channels. Structure of the GAF domain, a ubiquitous signaling motif and a new class of cyclic GMP receptor.,Ho YS, Burden LM, Hurley JH EMBO J. 2000 Oct 16;19(20):5288-99. PMID:11032796[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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