1B6B	Transferase	date	Jan 13, 1999
title	Melatonin Biosynthesis: The Structure Of Serotonin N-Acetylt At 2.5 A Resolution Suggests A Catalytic Mechanism
authors	A.B.Hickman, D.C.Klein, F.Dyda
compound		source
Molecule: Protein (Arylalkylamine N-Acetyltransferase) Chain: A, B Ec: 2.3.1.87 Engineered: Yes		Organism_scientific: Ovis Aries Organism_common: Sheep Organism_taxid: 9940 Expression_system: Escherichia Coli Expression_system_taxid: 562
symmetry	Space Group: P 61	R_factor 0.217 R_Free 0.282
crystal cell	length a length b length c angle alpha angle beta angle gamma 56.610 56.610 207.750 90.00 90.00 120.00
method	X-Ray Diffraction	resolution	2.50 Å
ligand		enzyme	Transferase E.C.2.3.1.87 BRENDA
related structures	by homologous chain: 1IB1, 1KUY
Gene Ontology	Chain Function Process Component A, B
Primary reference	Melatonin biosynthesis: the structure of serotonin N-acetyltransferase at 2.5 A resolution suggests a catalytic mechanism., Hickman AB, Klein DC, Dyda F, Mol Cell 1999 Jan;3(1):23-32. PMID:10024876

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (56 Kb) [Save to disk] Biological Unit Coordinates (1b6b.pdb1.gz) 28 Kb Biological Unit Coordinates (1b6b.pdb2.gz) 26 Kb CSU: Contacts of Structural Units for 1B6B Likely Quarternary Molecular Structure file(s) for 1B6B Structure Factors (94 Kb) Retrieve 1B6B in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1B6B from S2C, [Save to disk] Re-refined 1b6b structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1B6B 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 1B6B

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 1B6B, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1b6ba_, region A [Jmol] [rasmolscript] [script source]     - Domain d1b6bb_, region B [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: [1b6b_B] [1b6b_A] [1b6b] SWISS-PROT database: [Q29495] Domain organization of [SNAT_SHEEP] by SWISSPFAM

Other resources with information on 1B6B

Community annotation for 1B6B at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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