1N25	Viral Protein	date	Oct 21, 2002
title	Crystal Structure Of The Sv40 Large T Antigen Helicase Domai
authors	D.Li, R.Zhao, W.Lilyestrom, D.Gai, R.Zhang, J.A.Decaprio, E.Fannin A.Jochimiak, G.Szakonyi, X.S.Chen
compound		source
Molecule: Large T Antigen Chain: A, B Fragment: Helicase Domain Engineered: Yes		Organism_scientific: Simian Virus 40 Organism_taxid: 10633 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Xa90 Expression_system_vector_type: Plasmid Expression_system_plasmid: Pgex-2tk
symmetry	Space Group: P 3 2 1	R_factor 0.243 R_Free 0.276
crystal cell	length a length b length c angle alpha angle beta angle gamma 120.321 120.321 132.202 90.00 90.00 120.00
method	X-Ray Diffraction	resolution	2.80 Å
ligand	ZN	enzyme
note	1N25 (Molecule of the Month:pdb47)
related structures	by homologous chain: 1SVO
Gene Ontology	Chain Function Process Component A, B
Primary reference	Structure of the replicative helicase of the oncoprotein SV40 large tumour antigen., Li D, Zhao R, Lilyestrom W, Gai D, Zhang R, DeCaprio JA, Fanning E, Jochimiak A, Szakonyi G, Chen XS, Nature 2003 May 29;423(6939):512-8. PMID:12774115

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (122 Kb) [Save to disk] Biological Unit Coordinates (1n25.pdb1.gz) 346 Kb LPC: Ligand-Protein Contacts for 1N25 CSU: Contacts of Structural Units for 1N25 Likely Quarternary Molecular Structure file(s) for 1N25 Structure Factors (317 Kb) Retrieve 1N25 in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1N25 from S2C, [Save to disk] Re-refined 1n25 structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1N25 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 1N25

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 1N25, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1n25a_, region A [Jmol] [rasmolscript] [script source]     - Domain d1n25b_, 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: [1n25_B] [1n25] [1n25_A] SWISS-PROT database: [P03070] Domain organization of [LT_SV40] by SWISSPFAM

Other resources with information on 1N25

Community annotation for 1N25 at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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