2HDD	Transcription Dna	date	Feb 10, 1998
title	Engrailed Homeodomain Q50k Variant Dna Complex
authors	L.Tucker-Kellogg, M.A.Rould, K.A.Chambers, S.E.Ades, R.T.Sauer, C
compound		source
Molecule: Dna (5'- D(Tptptptpgpcpcpaptpgptpapaptpcpcpc Pcpg 3'); Chain: C Engineered: Yes		Synthetic: Yes
Molecule: Dna (5'- D(Aptpcpcpgpgpgpgpaptptpapcpaptpgpg Pcpa 3'); Chain: D Engineered: Yes		Synthetic: Yes
Molecule: Protein (Engrailed Homeodomain Q50k) Chain: A, B Engineered: Yes Mutation: Yes		Organism_scientific: Drosophila Melanogaster Organism_common: Fruit Fly Organism_taxid: 7227 Expression_system: Escherichia Coli Expression_system_taxid: 562
symmetry	Space Group: C 1 2 1	R_factor 0.205 R_Free 0.251
crystal cell	length a length b length c angle alpha angle beta angle gamma 127.720 45.340 72.470 90.00 119.53 90.00
method	X-Ray Diffraction	resolution	1.90 Å
note	2HDD is a representative structure
related structures	by homologous chain: 1DU0
Gene Ontology	Chain Function Process Component A, B
Primary reference	Engrailed (Gln50-->Lys) homeodomain-DNA complex at 1.9 A resolution: structural basis for enhanced affinity and altered specificity., Tucker-Kellogg L, Rould MA, Chambers KA, Ades SE, Sauer RT, Pabo CO, Structure 1997 Aug 15;5(8):1047-54. PMID:9309220

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (44 Kb) [Save to disk] Biological Unit Coordinates (2hdd.pdb1.gz) 40 Kb CSU: Contacts of Structural Units for 2HDD Likely Quarternary Molecular Structure file(s) for 2HDD Retrieve 2HDD in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 2HDD from S2C, [Save to disk]

View 2HDD 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 2HDD

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 2HDD, from MSDmotif at EBI Genome occurence of 2HDD's fold from GeneCensus Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d2hdda_, region A [Jmol] [rasmolscript] [script source]     - Domain d2hddb_, 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: [2hdd_D] [2hdd] [2hdd_B] [2hdd_A] [2hdd_C] SWISS-PROT database: [P02836] Domain organization of [HMEN_DROME] by SWISSPFAM Domain found in 2HDD: [HOX ] by SMART

Other resources with information on 2HDD

Community annotation for 2HDD at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

Movements, Movies and Images

Images from IMB Jena Image Library of Biological Macromolecules.

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