1SMN	Endonuclease	date	Jan 25, 1995
title	Identification Of The Serratia Endonuclease Dimer: Structura And Implications For Catalysis
authors	M.D.Miller, K.L.Krause
compound		source
Molecule: Extracellular Endonuclease Chain: A, B Ec: 3.1.30.2 Engineered: Yes		Organism_scientific: Serratia Marcescens Organism_taxid: 615 Strain: Sm6 Gene: Nuca Expression_system: Serratia Marcescens Expression_system_taxid: 615 Expression_system_vector_type: Plasmid Expression_system_plasmid: Puc19nuc4oc Expression_system_gene: Nuca
symmetry	Space Group: P 21 21 2	R_factor 0.168 R_Free NULL
crystal cell	length a length b length c angle alpha angle beta angle gamma 106.700 74.500 68.900 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.04 Å
ligand		enzyme	Hydrolase E.C.3.1.30.2 BRENDA
related structures	by homologous chain: 1QAE
Gene Ontology	Chain Function Process Component A, B nuclease activity endonuclease activity
Primary reference	Identification of the Serratia endonuclease dimer: structural basis and implications for catalysis., Miller MD, Krause KL, Protein Sci 1996 Jan;5(1):24-33. PMID:8771193

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (83 Kb) [Save to disk] Biological Unit Coordinates (1smn.pdb1.gz) 79 Kb CSU: Contacts of Structural Units for 1SMN Likely Quarternary Molecular Structure file(s) for 1SMN Retrieve 1SMN in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1SMN from S2C, [Save to disk]

View 1SMN 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 1SMN

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1SMN, from MSDmotif at EBI Genome occurence of 1SMN's fold from GeneCensus Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1smna_, region A [Jmol] [rasmolscript] [script source]     - Domain d1smnb_, 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: [1smn] [1smn_B] [1smn_A] SWISS-PROT database: [P13717] Domain organization of [NUCA_SERMA] by SWISSPFAM Domains found in 1SMN: [Endonuclease_NS] [NUC ] by SMART

Other resources with information on 1SMN

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

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