1nh7 is a 1 chain structure with sequence from Mycobacterium tuberculosis h37rv. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The N-1-(5'-phosphoribosyl)-ATP transferase catalyzes the first step of the histidine biosynthetic pathway and is regulated by a feedback mechanism by the product histidine. The crystal structures of the N-1-(5'-phosphoribosyl)-ATP transferase from Mycobacterium tuberculosis in complex with inhibitor histidine and AMP has been determined to 1.8 A resolution and without ligands to 2.7 A resolution. The active enzyme exists primarily as a dimer, and the histidine-inhibited form is a hexamer. The structure represents a new fold for a phosphoribosyltransferase, consisting of three continuous domains. The inhibitor AMP binds in the active site cavity formed between the two catalytic domains. A model for the mechanism of allosteric inhibition has been derived from conformational differences between the AMP:His-bound and apo structures.
Crystal structure of ATP phosphoribosyltransferase from Mycobacterium tuberculosis.,Cho Y, Sharma V, Sacchettini JC J Biol Chem. 2003 Mar 7;278(10):8333-9. Epub 2003 Jan 2. PMID:12511575[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
↑ Cho Y, Sharma V, Sacchettini JC. Crystal structure of ATP phosphoribosyltransferase from Mycobacterium tuberculosis. J Biol Chem. 2003 Mar 7;278(10):8333-9. Epub 2003 Jan 2. PMID:12511575 doi:10.1074/jbc.M212124200
