1G8M	Transferase, Hydrolase	date	Nov 17, 2000
title	Crystal Structure Of Avian Atic, A Bifunctional Transformyla Cyclohydrolase Enzyme In Purine Biosynthesis At 1.75 Ang. R
authors	S.E.Greasley, P.Horton, G.P.Beardsley, S.J.Benkovic, I.A.Wilson
compound		source
Molecule: Aicar Transformylase-Imp Cyclohydrolase Chain: A, B Fragment: Aminoimidazole Carboxamide Ribonucleotide Transfo Inosine Monophosphate Cyclohydrolase; Synonym: Bifunctional Purine Biosynthesis Protein Purh [Inc Phosphoribosylaminoimidazolecarboxamide Formyltransferase ( Transformylase) And Imp Cyclohydrolase (Inosinicase, Imp Sy Atic)]; Ec: 2.1.2.3, 3.5.4.10 Engineered: Yes Mutation: Yes		Organism_scientific: Gallus Gallus Organism_common: Chicken Organism_taxid: 9031 Gene: Purh Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: B834(De3) Expression_system_vector_type: Plasmid Expression_system_plasmid: Pet 28a
symmetry	Space Group: P 1 21 1	R_factor 0.200 R_Free 0.216
crystal cell	length a length b length c angle alpha angle beta angle gamma 65.100 106.000 103.500 90.00 108.00 90.00
method	X-Ray Diffraction	resolution	1.75 Å
ligand	G, K, MSE	enzyme	Transferase E.C.2.1.2.3 BRENDA
note	1G8M is a representative structure
related structures	by homologous chain: 1THZ
Gene Ontology	Chain Function Process Component A, B
Primary reference	Crystal structure of a bifunctional transformylase and cyclohydrolase enzyme in purine biosynthesis., Greasley SE, Horton P, Ramcharan J, Beardsley GP, Benkovic SJ, Wilson IA, Nat Struct Biol 2001 May;8(5):402-6. PMID:11323713

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (204 Kb) [Save to disk] Biological Unit Coordinates (1g8m.pdb1.gz) 197 Kb LPC: Ligand-Protein Contacts for 1G8M CSU: Contacts of Structural Units for 1G8M Likely Quarternary Molecular Structure file(s) for 1G8M Retrieve 1G8M in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1G8M from S2C, [Save to disk]

View 1G8M in 3D

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Visual 3D analysis of 1G8M

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1G8M, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1g8ma2, region A:201-593 [Jmol] [rasmolscript] [script source]     - Domain d1g8ma1, region A:4-200 [Jmol] [rasmolscript] [script source]     - Domain d1g8mb2, region B:201-593 [Jmol] [rasmolscript] [script source]     - Domain d1g8mb1, region B:4-200 [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: [1g8m] [1g8m_B] [1g8m_A] SWISS-PROT database: [P31335] Domain organization of [PUR9_CHICK] by SWISSPFAM Domains found in 1G8M: [AICARFT_IMPCHas] [MGS ] by SMART

Other resources with information on 1G8M

Community annotation for 1G8M at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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