1XSB	Hydrolase	date	Oct 18, 2004
title	Structure Of The Nudix Enzyme Ap4a Hydrolase From Homo Sapie Mutant) In Complex With Atp. No Atp Restraints Included
authors	J.D.Swarbrick, S.Buyya, D.Gunawardana, K.R.Gayler, A.G.Mclennan, P.R.Gooley
compound		source
Molecule: Bis(5'-Nucleosyl)-Tetraphosphatase Chain: A Synonym: Diadenosine 5',5'''-P1,P4-Tetraphosphate Asymmetri Hydrolase, Diadenosine Tetraphosphatase, Ap4a Hydrolase, Ap Ec: 3.6.1.17 Engineered: Yes Mutation: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Expression_system: Escherichia Coli Bl21 Expression_system_taxid: 511693 Expression_system_strain: Bl21 Expression_system_vector_type: Plasmid Expression_system_plasmid: Pgex-6-P3
method	Solution NMR
ligand		enzyme	Hydrolase E.C.3.6.1.17 BRENDA
related structures	by homologous chain: 1XSA, 1XSC
Gene Ontology	Chain Function Process Component A
Primary reference	Structure and substrate-binding mechanism of human Ap4A hydrolase., Swarbrick JD, Buyya S, Gunawardana D, Gayler KR, McLennan AG, Gooley PR, J Biol Chem 2005 Mar 4;280(9):8471-81. Epub 2004 Dec 13. PMID:15596429

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (1597 Kb) [Save to disk] Biological Unit Coordinates (1xsb.pdb1.gz) 40 Kb CSU: Contacts of Structural Units for 1XSB Original NMR restraints for 1XSB from PDB Experimental data, such as chemical shifts, at BioMagResBank (BMRB) NMR Restraints Grid from BioMagResBank (BMRB) Retrieve 1XSB in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1XSB from S2C, [Save to disk]

View 1XSB 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 1XSB

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1XSB, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1xsba_, region A [Jmol] [rasmolscript] [script source]

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [1xsb_A] [1xsb] SWISS-PROT database: [P50583] Domain organization of [AP4A_HUMAN] by SWISSPFAM

Other resources with information on 1XSB

Community annotation for 1XSB at PDBWiki (http://pdbwiki.org) NMR Ensemble (OLDERADO: core, domain and representative structure database) MMDB (Entrez's Structure Database)

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