1CY9	Isomerase	date	Aug 31, 1999
title	Crystal Structure Of The 30 Kda Fragment Of E. Coli Dna Topo I. Monoclinic Form
authors	H.Feinberg, C.Lima, A.Mondragon
compound		source
Molecule: Dna Topoisomerase I Chain: A, B Fragment: 30 Kda Fragment Comprising Domains II And III Ec: 5.99.1.2 Engineered: Yes		Organism_scientific: Escherichia Coli Organism_taxid: 83333 Strain: K12 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Dh5 Alpha Expression_system_vector_type: Plasmid Expression_system_plasmid: Pgex-2t
symmetry	Space Group: P 1 21 1	R_factor 0.205 R_Free 0.242
crystal cell	length a length b length c angle alpha angle beta angle gamma 36.820 146.550 64.570 90.00 106.48 90.00
method	X-Ray Diffraction	resolution	1.80 Å
ligand		enzyme	Isomerase E.C.5.99.1.2 BRENDA
related structures	by homologous chain: 1ECL, 1MW9
Gene Ontology	Chain Function Process Component A, B
Primary reference	Conformational changes in E. coli DNA topoisomerase I., Feinberg H, Lima CD, Mondragon A, Nat Struct Biol 1999 Oct;6(10):918-22. PMID:10504724

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (90 Kb) [Save to disk] Biological Unit Coordinates (1cy9.pdb1.gz) 86 Kb CSU: Contacts of Structural Units for 1CY9 Likely Quarternary Molecular Structure file(s) for 1CY9 Retrieve 1CY9 in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1CY9 from S2C, [Save to disk]

View 1CY9 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 1CY9

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1CY9, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1cy9a_, region A [Jmol] [rasmolscript] [script source]     - Domain d1cy9b_, 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: [1cy9] [1cy9_A] [1cy9_B] SWISS-PROT database: [P06612] Domain organization of [TOP1_ECOLI] by SWISSPFAM Domain found in 1CY9: [TOP1Ac ] by SMART

Other resources with information on 1CY9

Community annotation for 1CY9 at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

Movements, Movies and Images

Images from IMB Jena Image Library of Biological Macromolecules.

You may enter another PDB ID code

Go [Back], to the [PDB Lite page], to the [OCA Search page] or to the [PDB Home page]

---

OCA© by Jaime Prilusky, 1996-2014,2022 Bioinformatics Unit Weizmann Institute of Science

---