1ot2 | pdb_00001ot2

Bacillus circulans strain 251 Cyclodextrin glycosyl transferase mutant D135N

spinqualitylabelsall models 1ot2, resolution 2.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1ot2 is a 1 chain structure with sequence from Atcc 24. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ACY, BGC, CA, EPE, GLC, MAL, MPD Related: 1cdg, 1ot1 Activity: Cyclomaltodextrin glucanotransferase, with EC number 2.4.1.19 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT 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 PubMed The alpha-amylase family is a large group of starch processing enzymes [Svensson, B. (1994) Plant Mol. Biol. 25, 141-157]. It is characterized by four short sequence motifs that contain the seven fully conserved amino acid residues in this family: two catalytic carboxylic acid residues and four substrate binding residues. The seventh conserved residue (Asp135) has no direct interactions with either substrates or products, but it is hydrogen-bonded to Arg227, which does bind the substrate in the catalytic site. Using cyclodextrin glycosyltransferase as an example, this paper provides for the first time definite biochemical and structural evidence that Asp135 is required for the proper conformation of several catalytic site residues and therefore for activity. The fully conserved Asp residue in conserved sequence region I of the alpha-amylase family is crucial for the catalytic site architecture and activity.,Leemhuis H, Rozeboom HJ, Dijkstra BW, Dijkhuizen L FEBS Lett. 2003 Apr 24;541(1-3):47-51. PMID:12706817 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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