1QZF	Oxidoreductase, Transferase	date	Sep 16, 2003
title	Crystal Structure Of Dhfr-Ts From Cryptosporidium Hominis
authors	R.H.O'Neil, R.H.Lilien, B.R.Donald, R.M.Stroud, A.C.Anderson
compound		source
Molecule: Bifunctional Dihydrofolate Reductase-Thymidylate Chain: A, B, C, D, E Ec: 1.5.1.3, 2.1.1.45 Engineered: Yes		Organism_scientific: Cryptosporidium Hominis Organism_taxid: 237895 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Pa414
symmetry	Space Group: C 1 2 1	R_factor 0.225 R_Free 0.245
crystal cell	length a length b length c angle alpha angle beta angle gamma 214.900 116.300 219.700 90.00 95.23 90.00
method	X-Ray Diffraction	resolution	2.80 Å
ligand	CB3, FOL, NDP, UMP	enzyme	Oxidoreductase E.C.1.5.1.3 BRENDA
related structures	by homologous chain: 1SEJ
Gene Ontology	Chain Function Process Component A, D, C, E, B
Primary reference	Phylogenetic classification of protozoa based on the structure of the linker domain in the bifunctional enzyme, dihydrofolate reductase-thymidylate synthase., O'Neil RH, Lilien RH, Donald BR, Stroud RM, Anderson AC, J Biol Chem 2003 Dec 26;278(52):52980-7. Epub 2003 Oct 9. PMID:14555647

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (445 Kb) [Save to disk] Biological Unit Coordinates (1qzf.pdb1.gz) 179 Kb Biological Unit Coordinates (1qzf.pdb2.gz) 179 Kb Biological Unit Coordinates (1qzf.pdb3.gz) 177 Kb LPC: Ligand-Protein Contacts for 1QZF CSU: Contacts of Structural Units for 1QZF Likely Quarternary Molecular Structure file(s) for 1QZF Structure Factors (1065 Kb) Retrieve 1QZF in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1QZF from S2C, [Save to disk] Re-refined 1qzf structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1QZF 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 1QZF

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 1QZF, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1qzfa2, region A:181-521 [Jmol] [rasmolscript] [script source]     - Domain d1qzfa1, region A:3-180 [Jmol] [rasmolscript] [script source]     - Domain d1qzfb2, region B:181-521 [Jmol] [rasmolscript] [script source]     - Domain d1qzfb1, region B:3-180 [Jmol] [rasmolscript] [script source]     - Domain d1qzfc2, region C:181-521 [Jmol] [rasmolscript] [script source]     - Domain d1qzfc1, region C:3-180 [Jmol] [rasmolscript] [script source]     - Domain d1qzfd2, region D:181-521 [Jmol] [rasmolscript] [script source]     - Domain d1qzfd1, region D:3-180 [Jmol] [rasmolscript] [script source]     - Domain d1qzfe2, region E:181-521 [Jmol] [rasmolscript] [script source]     - Domain d1qzfe1, region E:3-180 [Jmol] [rasmolscript] [script source]

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [1qzf_B] [1qzf_A] [1qzf_C] [1qzf_E] [1qzf] [1qzf_D] SWISS-PROT database: [Q27552] Domain organization of [Q27552_CRYPV] by SWISSPFAM

Other resources with information on 1QZF

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

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