1C7S	Hydrolase	date	Mar 14, 2000
title	Beta-N-Acetylhexosaminidase Mutant D539a Complexed With Di-N Beta-D-Glucosamine (Chitobiase)
authors	G.Prag, Y.Papanikolau, G.Tavlas, C.E.Vorgias, K.Petratos, A.B.Opp
compound		source
Molecule: Beta-N-Acetylhexosaminidase Chain: A Fragment: Mature Protein, Periplasmatic Targeting Sequence 1-27 Cleaved Off During Maturation; Synonym: N-Acetyl-Beta-D-Glucosaminidase, Chitobiase Ec: 3.2.1.52 Engineered: Yes Mutation: Yes Other_details: Complexed With Dinag		Organism_scientific: Serratia Marcescens Organism_taxid: 615 Strain: A9301 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Xl1-Blue Expression_system_cellular_location: Periplasm Expression_system_plasmid: Pkk177-3
symmetry	Space Group: P 21 21 2	R_factor 0.171 R_Free 0.224
crystal cell	length a length b length c angle alpha angle beta angle gamma 108.794 99.960 86.308 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	1.80 Å
ligand	NAG, SO4	enzyme	Hydrolase E.C.3.2.1.52 BRENDA
related structures	by homologous chain: 1QBA
Gene Ontology	Chain Function Process Component A
Primary reference	Structures of chitobiase mutants complexed with the substrate Di-N-acetyl-d-glucosamine: the catalytic role of the conserved acidic pair, aspartate 539 and glutamate 540., Prag G, Papanikolau Y, Tavlas G, Vorgias CE, Petratos K, Oppenheim AB, J Mol Biol 2000 Jul 14;300(3):611-7. PMID:10884356

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (155 Kb) [Save to disk] Biological Unit Coordinates (1c7s.pdb1.gz) 298 Kb LPC: Ligand-Protein Contacts for 1C7S CSU: Contacts of Structural Units for 1C7S Likely Quarternary Molecular Structure file(s) for 1C7S Structure Factors (722 Kb) Retrieve 1C7S in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1C7S from S2C, [Save to disk] Re-refined 1c7s structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1C7S 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 1C7S

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 1C7S, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1c7sa4, region A:201-337 [Jmol] [rasmolscript] [script source]     - Domain d1c7sa2, region A:28-200 [Jmol] [rasmolscript] [script source]     - Domain d1c7sa3, region A:338-780 [Jmol] [rasmolscript] [script source]     - Domain d1c7sa1, region A:781-885 [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: [1c7s] [1c7s_A] SWISS-PROT database: [Q54468] Domain organization of [CHB_SERMA] by SWISSPFAM Domain found in 1C7S: [CHB_HEX ] by SMART

Other resources with information on 1C7S

Community annotation for 1C7S at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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