1SC1	Hydrolase	date	Feb 11, 2004
title	Crystal Structure Of An Active-Site Ligand-Free Form Of The Caspase-1 C285a Mutant
authors	M.J.Romanowski, J.M.Scheer, T.O'Brien, R.S.Mcdowell
compound		source
Molecule: Interleukin-1 Beta Convertase Chain: A Fragment: Interleukin-1 Beta Convertase P20 Synonym: Il-1bc, Il-1 Beta Converting Enzyme, Ice, Interleu Converting Enzyme, P45, Caspase-1, Casp-1; Ec: 3.4.22.36 Engineered: Yes Mutation: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Gene: Casp1, Il1bc, Il1bce Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Bl21(De3) Codon+ Expression_system_vector_type: Plasmid Expression_system_plasmid: Prset
Molecule: Interleukin-1 Beta Convertase Chain: B Fragment: Interleukin-1 Beta Convertase P10 Synonym: Il-1bc, Il-1 Beta Converting Enzyme, Ice, Interleu Converting Enzyme, P45, Caspase-1, Casp-1; Ec: 3.4.22.36 Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Gene: Casp1, Il1bc, Il1bce Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Bl21(De3) Codon+ Expression_system_vector_type: Plasmid Expression_system_plasmid: Prset
symmetry	Space Group: P 32 2 1	R_factor 0.231 R_Free 0.273
crystal cell	length a length b length c angle alpha angle beta angle gamma 71.782 71.782 118.451 90.00 90.00 120.00
method	X-Ray Diffraction	resolution	2.60 Å
ligand	CL	enzyme	Hydrolase E.C.3.4.22.36 BRENDA
related structures	by homologous chain: 1ICE, 1RWM
Primary reference	Crystal structures of a ligand-free and malonate-bound human caspase-1: implications for the mechanism of substrate binding., Romanowski MJ, Scheer JM, O'Brien T, McDowell RS, Structure. 2004 Aug;12(8):1361-71. PMID:15296730

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (48 Kb) [Save to disk] Biological Unit Coordinates (1sc1.pdb1.gz) 85 Kb Biological Unit Coordinates (1sc1.pdb2.gz) 85 Kb LPC: Ligand-Protein Contacts for 1SC1 CSU: Contacts of Structural Units for 1SC1 Likely Quarternary Molecular Structure file(s) for 1SC1 Structure Factors (81 Kb) Retrieve 1SC1 in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1SC1 from S2C, [Save to disk] Re-refined 1sc1 structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1SC1 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. On AstexViewer, from MSD-EBI (viewer documentation). On RasMol (Install RasMol freeware) Here's help on how to use RasMol.

Visual 3D analysis of 1SC1

Cartoon representation from PDB Cartoon 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 Crystal Contacts, from CryCo at Weizmann Institute 3D motif for 1SC1, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1sc1.1, region A:,B [Jmol] [rasmolscript] [script source]     - Domain d1d1sc1, region C:1-162,C:339-374 [Jmol] [rasmolscript] [script source] Fold representative 1sc1 from FSSP and Dali (Families of Structurally Similar Proteins) 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: [1sc1_A] [1sc1_B] SWISS-PROT database: [P29466] Domain organization of [CASP1_HUMAN] by SWISSPFAM Domain found in 1SC1: [CASc ] by SMART Alignments of the sequence of 1SC1 with the sequences similar proteins can be viewed for 1SC1's classification [CASP1_HUMAN] at ProtoMap. Click on "Neighbors List", then on the "See Alignments" button below the list. A sequence distance tree ("phylogenetic tree") can be viewed for 1ACL's classification [CASP1_HUMAN] at ProtoMap. Click on the Cluster number.

Other resources with information on 1SC1

Community annotation for 1SC1 at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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