1KTQ	Nucleotidyltransferase	date	Aug 16, 1995
title	Dna Polymerase
authors	S.Korolev, G.Waksman
compound		source
Molecule: Dna Polymerase I Chain: A Synonym: Klentaq Ec: 2.7.7.7 Engineered: Yes		Organism_scientific: Thermus Aquaticus Organism_taxid: 271 Expression_system: Escherichia Coli Expression_system_taxid: 562
symmetry	Space Group: P 21 21 2	R_factor 0.198 R_Free 0.262
crystal cell	length a length b length c angle alpha angle beta angle gamma 109.400 136.800 45.600 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.50 Å
ligand		enzyme	Transferase E.C.2.7.7.7 BRENDA
related structures	by homologous chain: 1TAQ, 5KTQ
Gene Ontology	Chain Function Process Component A
Primary reference	Crystal structure of the large fragment of Thermus aquaticus DNA polymerase I at 2.5-A resolution: structural basis for thermostability., Korolev S, Nayal M, Barnes WM, Di Cera E, Waksman G, Proc Natl Acad Sci U S A 1995 Sep 26;92(20):9264-8. PMID:7568114

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (129 Kb) [Save to disk] Biological Unit Coordinates (1ktq.pdb1.gz) 125 Kb CSU: Contacts of Structural Units for 1KTQ Likely Quarternary Molecular Structure file(s) for 1KTQ Retrieve 1KTQ in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1KTQ from S2C, [Save to disk]

View 1KTQ 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 1KTQ

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1KTQ, from MSDmotif at EBI Genome occurence of 1KTQ's fold from GeneCensus Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1ktq_1, region 290-422 [Jmol] [rasmolscript] [script source]     - Domain d1ktq_2, region 423-832 [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: [1ktq] [1ktq_A] SWISS-PROT database: [P19821] Domain organization of [DPO1_THEAQ] by SWISSPFAM Domain found in 1KTQ: [POLAc ] by SMART

Other resources with information on 1KTQ

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

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