1MAS	Hydrolase	date	Dec 18, 1995
title	Purine Nucleoside Hydrolase
authors	M.Degano, D.N.Gopaul, G.Scapin, V.L.Schramm, J.C.Sacchettini
compound		source
Molecule: Inosine-Uridine Nucleoside N-Ribohydrolase Chain: A, B Synonym: Purine Nucleoside Hydrolase, Inosine-Uridine Nucle Iu-Nh; Ec: 3.2.2.1 Engineered: Yes Mutation: Yes		Organism_scientific: Crithidia Fasciculata Organism_taxid: 5656 Gene: Iu-Nh From C.Fasciculata Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_plasmid: Pet3d-Iunh Expression_system_gene: Iu-Nh From C.Fasciculata
symmetry	Space Group: P 21 21 2	R_factor 0.170 R_Free NULL
crystal cell	length a length b length c angle alpha angle beta angle gamma 63.840 131.530 90.100 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.50 Å
ligand	K	enzyme	Hydrolase E.C.3.2.2.1 BRENDA
related structures	by homologous chain: 1EZR, 2MAS
Gene Ontology	Chain Function Process Component A, B
Primary reference	Three-dimensional structure of the inosine-uridine nucleoside N-ribohydrolase from Crithidia fasciculata., Degano M, Gopaul DN, Scapin G, Schramm VL, Sacchettini JC, Biochemistry 1996 May 14;35(19):5971-81. PMID:8634238

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (99 Kb) [Save to disk] Biological Unit Coordinates (1mas.pdb1.gz) 184 Kb LPC: Ligand-Protein Contacts for 1MAS CSU: Contacts of Structural Units for 1MAS Likely Quarternary Molecular Structure file(s) for 1MAS Retrieve 1MAS in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1MAS from S2C, [Save to disk]

View 1MAS 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 1MAS

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1MAS, from MSDmotif at EBI Genome occurence of 1MAS's fold from GeneCensus Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1masa_, region A [Jmol] [rasmolscript] [script source]     - Domain d1masb_, 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: [1mas_B] [1mas] [1mas_A] SWISS-PROT database: [Q27546] Domain organization of [IUNH_CRIFA] by SWISSPFAM

Other resources with information on 1MAS

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

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