2QPU	Hydrolase	date	Jul 25, 2007
title	Sugar Tongs Mutant S378p In Complex With Acarbose
authors	N.Aghajari, M.H.Jensen, S.Tranier, R.Haser
compound		source
Molecule: Alpha-Amylase Type A Isozyme Chain: A, B, C Synonym: 1,4-Alpha-D- Glucan Glucanohydrolase, Amy1, Low Pi Amylase; Ec: 3.2.1.1 Engineered: Yes Mutation: Yes		Organism_scientific: Hordeum Vulgare Organism_common: Barley Organism_taxid: 4513 Gene: Amy1.1 Expression_system: Pichia Pastoris Expression_system_taxid: 4922
symmetry	Space Group: P 21 21 2	R_factor 0.178 R_Free 0.209
crystal cell	length a length b length c angle alpha angle beta angle gamma 218.930 89.650 62.080 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	1.70 Å
ligand	AC1, BGC, CA, EDO, GLC, QPU	enzyme	Hydrolase E.C.3.2.1.1 BRENDA
Gene Ontology	Chain Function Process Component A, C, B
Primary reference	The 'pair of sugar tongs' site on the non-catalytic domain C of barley alpha-amylase participates in substrate binding and activity., Bozonnet S, Jensen MT, Nielsen MM, Aghajari N, Jensen MH, Kramhoft B, Willemoes M, Tranier S, Haser R, Svensson B, FEBS J. 2007 Oct;274(19):5055-67. Epub 2007 Sep 4. PMID:17803687

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (231 Kb) [Save to disk] Biological Unit Coordinates (2qpu.pdb1.gz) 78 Kb Biological Unit Coordinates (2qpu.pdb2.gz) 77 Kb Biological Unit Coordinates (2qpu.pdb3.gz) 77 Kb LPC: Ligand-Protein Contacts for 2QPU CSU: Contacts of Structural Units for 2QPU Likely Quarternary Molecular Structure file(s) for 2QPU Structure Factors (1326 Kb) Retrieve 2QPU in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 2QPU from S2C, [Save to disk] Re-refined 2qpu structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 2QPU in 3D

Proteopedia, because life has more than 2D. On Jmol, a nice Rasmol like molecule viewer. This is good for easiest viewing of basic structure. On FirstGlance, an excellent tool for a guided tour on the structure components, by E. Martz.

Visual 3D analysis of 2QPU

Ramachandran plot from PDBSum

Structure-derived information

Electron Density related parameters from EDS Electron Density Server, at Upsala Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 2QPU, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [2qpu] [2qpu_B] [2qpu_A] [2qpu_C] SWISS-PROT database: [P00693] Domain organization of [AMY1_HORVU] by SWISSPFAM Domains found in 2QPU: [Aamy] [Alpha-amyl_C2 ] by SMART

Other resources with information on 2QPU

Community annotation for 2QPU at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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Images from IMB Jena Image Library of Biological Macromolecules.

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