1A40	Phosphate-Binding Protein	date	Feb 10, 1998
title	Phosphate-Binding Protein With Ala 197 Replaced With Trp
authors	P.S.Ledivina, Z.Wang, A.Tsai, E.Koehl, F.A.Quiocho
compound		source
Molecule: Phosphate-Binding Periplasmic Protein Precursor Chain: A Synonym: Pbp A197w Engineered: Yes Mutation: Yes		Organism_scientific: Escherichia Coli Organism_taxid: 562 Strain: Pan92 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Pet-22b Expression_system_vector_type: Plasmid
symmetry	Space Group: P 21 21 21	R_factor 0.203 R_Free 0.269
crystal cell	length a length b length c angle alpha angle beta angle gamma 41.410 62.760 122.730 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	1.70 Å
ligand	PO4	enzyme
related structures	by homologous chain: 1IXI, 1QUL
Gene Ontology	Chain Function Process Component A
Primary reference	Dominant role of local dipolar interactions in phosphate binding to a receptor cleft with an electronegative charge surface: equilibrium, kinetic, and crystallographic studies., Ledvina PS, Tsai AL, Wang Z, Koehl E, Quiocho FA, Protein Sci 1998 Dec;7(12):2550-9. PMID:9865949

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (60 Kb) [Save to disk] Biological Unit Coordinates (1a40.pdb1.gz) 57 Kb LPC: Ligand-Protein Contacts for 1A40 CSU: Contacts of Structural Units for 1A40 Likely Quarternary Molecular Structure file(s) for 1A40 Structure Factors (277 Kb) Retrieve 1A40 in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1A40 from S2C, [Save to disk] Re-refined 1a40 structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1A40 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 1A40

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 1A40, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1a40__, region [Jmol] [rasmolscript] [script source] Class (fold), Architecture (subfold), Topology, Homologous superfamily from CATH Summaries and structural analyses of PDB data files from PDBSum Identification of Protein Pockets & Cavities at CASTp

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [1a40] [1a40_A] SWISS-PROT database: [P0AG82] Belongs to the atp-binding cassette (abc) superfamily according to TCDB. Domain organization of [PSTS_ECOLI] by SWISSPFAM

Other resources with information on 1A40

Community annotation for 1A40 at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

Movements, Movies and Images

Domain movements in 1A40 from the Database of Macromolecular Movements. Images from IMB Jena Image Library of Biological Macromolecules.

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