1XNK	Hydrolase	date	Oct 05, 2004
title	Beta-1,4-Xylanase From Chaetomium Thermophilum Complexed Wit Thioxylopentoside
authors	J.Hakanpaa, N.Hakulinen, J.Rouvinen
compound		source
Molecule: Endoxylanase 11a Chain: A, B Fragment: Catalytic Domain Ec: 3.2.1.8 Engineered: Yes		Organism_scientific: Chaetomium Thermophilum Organism_taxid: 209285 Expression_system: Hypocrea Jecorina Expression_system_taxid: 51453
symmetry	Space Group: P 21 21 2	R_factor 0.197 R_Free 0.224
crystal cell	length a length b length c angle alpha angle beta angle gamma 108.241 57.593 66.205 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	1.55 Å
ligand	PCA, SO4, TWY, Z4U	enzyme	Hydrolase E.C.3.2.1.8 BRENDA
related structures	by homologous chain: 1ENX, 1RED
Gene Ontology	Chain Function Process Component A, B
Primary reference	Determination of thioxylo-oligosaccharide binding to family 11 xylanases using electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry and X-ray crystallography., Janis J, Hakanpaa J, Hakulinen N, Ibatullin FM, Hoxha A, Derrick PJ, Rouvinen J, Vainiotalo P, FEBS J 2005 May;272(9):2317-33. PMID:15853815

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (74 Kb) [Save to disk] Biological Unit Coordinates (1xnk.pdb1.gz) 36 Kb Biological Unit Coordinates (1xnk.pdb2.gz) 35 Kb Biological Unit Coordinates (1xnk.pdb3.gz) 137 Kb LPC: Ligand-Protein Contacts for 1XNK CSU: Contacts of Structural Units for 1XNK Likely Quarternary Molecular Structure file(s) for 1XNK Structure Factors (466 Kb) Retrieve 1XNK in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1XNK from S2C, [Save to disk] Re-refined 1xnk structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1XNK 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 1XNK

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 1XNK, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [1xnk_A] [1xnk_B] [1xnk] SWISS-PROT database: [Q8J1V6] Domain organization of [Q8J1V6_9PEZI] by SWISSPFAM

Other resources with information on 1XNK

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

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