4HTC	Hydrolase Hydrolase Inhibitor	date	Jun 25, 1993
title	The Refined Structure Of The Hirudin-Thrombin Complex
authors	A.Tulinsky, T.J.Rydel, W.Bode, R.Huber
compound		source
Molecule: Alpha-Thrombin (Small Subunit) Chain: L Ec: 3.4.21.5 Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606
Molecule: Alpha-Thrombin (Large Subunit) Chain: H Ec: 3.4.21.5 Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606
Molecule: Hirudin Variant 2 Chain: I Engineered: Yes		Organism_scientific: Hirudo Medicinalis Organism_common: Medicinal Leech Organism_taxid: 6421
symmetry	Space Group: P 43 21 2	R_factor R_Free NULL
crystal cell	length a length b length c angle alpha angle beta angle gamma 90.540 90.540 132.040 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.30 Å
ligand	NAG	enzyme	Hydrolase E.C.3.4.21.5 BRENDA
related structures	by homologous chain: 1BBR, 1ETS, 1HRT
Gene Ontology	Chain Function Process Component H I serine-type endopeptidase in... L
Primary reference	Refined structure of the hirudin-thrombin complex., Rydel TJ, Tulinsky A, Bode W, Huber R, J Mol Biol 1991 Sep 20;221(2):583-601. PMID:1920434

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (67 Kb) [Save to disk] Biological Unit Coordinates (4htc.pdb1.gz) 61 Kb Biological Unit Coordinates (4htc.pdb2.gz) 121 Kb LPC: Ligand-Protein Contacts for 4HTC CSU: Contacts of Structural Units for 4HTC Likely Quarternary Molecular Structure file(s) for 4HTC Retrieve 4HTC in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 4HTC from S2C, [Save to disk]

View 4HTC 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 4HTC

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 4HTC, from MSDmotif at EBI Genome occurence of 4HTC's fold from GeneCensus Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d4htci_, region I [Jmol] [rasmolscript] [script source]     - Domain d4htc.1, region L:,H [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: [4htc] [4htc_I] [4htc_L] [4htc_H] SWISS-PROT database: [P09945] [P00734] Domain organization of [HIRV2_HIRME] [THRB_HUMAN] by SWISSPFAM Domain found in 4HTC: [Tryp_SPc ] by SMART

Other resources with information on 4HTC

Community annotation for 4HTC at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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