1CQT	Gene Regulation Dna	date	Aug 11, 1999
title	Crystal Structure Of A Ternary Complex Containing An Oca-B Peptide, The Oct-1 Pou Domain, And An Octamer Element
authors	D.I.Chasman, K.Cepek, P.A.Sharp, C.O.Pabo
compound		source
Molecule: Dna (5'- D(Tpgptpaptpgpcpapapaptpapapgpg)-3'); Chain: M, O Engineered: Yes		Synthetic: Yes
Molecule: Dna (5'- D(Apcpcptptpaptptptpgpcpaptpapc)-3'); Chain: N, P Engineered: Yes		Synthetic: Yes
Molecule: Pou Domain, Class 2, Transcription Factor 1 Chain: A, B Fragment: Oct-1 Pou Domain, Residues 278-439 Synonym: Octamer-Binding Transcription Factor 1, Otf-1, Nf- A1; Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_vector_type: Plasmid Expression_system_plasmid: See Reference 1
Molecule: Pou Domain, Class 2, Associating Factor 1 Chain: I, J Fragment: Oca-B Peptide, Residues 1-44 Synonym: Oct-Binding Factor, Oca-B, Obf-1, Bob1 Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Cell: B-Cell Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_vector_type: Plasmid Expression_system_plasmid: Pgex
symmetry	Space Group: P 41 21 2	R_factor 0.264 R_Free 0.326
crystal cell	length a length b length c angle alpha angle beta angle gamma 93.722 93.722 152.651 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	3.20 Å
Primary reference	Crystal structure of an OCA-B peptide bound to an Oct-1 POU domain/octamer DNA complex: specific recognition of a protein-DNA interface., Chasman D, Cepek K, Sharp PA, Pabo CO, Genes Dev 1999 Oct 15;13(20):2650-7. PMID:10541551

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (78 Kb) [Save to disk] Biological Unit Coordinates (1cqt.pdb1.gz) 38 Kb Biological Unit Coordinates (1cqt.pdb2.gz) 37 Kb CSU: Contacts of Structural Units for 1CQT Likely Quarternary Molecular Structure file(s) for 1CQT Retrieve 1CQT in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1CQT from S2C, [Save to disk]

View 1CQT 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. On AstexViewer, from MSD-EBI (viewer documentation). On RasMol (Install RasMol freeware) Here's help on how to use RasMol.

Visual 3D analysis of 1CQT

Cartoon representation from PDB Cartoon Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute Crystal Contacts, from CryCo at Weizmann Institute 3D motif for 1CQT, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1cqta1, region A:102-161 [Jmol] [rasmolscript] [script source]     - Domain d1cqta2, region A:2-75 [Jmol] [rasmolscript] [script source]     - Domain d1cqtb2, region B:505-575 [Jmol] [rasmolscript] [script source]     - Domain d1cqtb1, region B:602-661 [Jmol] [rasmolscript] [script source] Fold representative 1cqt from FSSP and Dali (Families of Structurally Similar Proteins) 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: [1cqt_A] [1cqt_B] [1cqt_I] [1cqt_J] [1cqt_M] [1cqt_N] [1cqt_O] [1cqt_P] SWISS-PROT database: [Q16633] [P14859] Domain organization of [OBF1_HUMAN] [PO2F1_HUMAN] by SWISSPFAM Domains found in 1CQT: [HOX] [POU ] by SMART Alignments of the sequence of 1CQT with the sequences similar proteins can be viewed for 1CQT's classification [OBF1_HUMAN] [PO2F1_HUMAN] at ProtoMap. Click on "Neighbors List", then on the "See Alignments" button below the list. A sequence distance tree ("phylogenetic tree") can be viewed for 1ACL's classification [OBF1_HUMAN] [PO2F1_HUMAN] at ProtoMap. Click on the Cluster number.

Other resources with information on 1CQT

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

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