4SLI	Enzyme	date	Oct 04, 1998
title	Leech Intramolecular Trans-Sialidase Complexed With 2-Propen An Inactive Substrate Analogue
authors	Y.Luo, S.C.Li, Y.T.Li, M.Luo
compound		source
Molecule: Intramolecular Trans-Sialidase Chain: A Fragment: Devoid Of N-Terminal 28 Residues Ec: 3.2.1.18 Engineered: Yes		Organism_scientific: Macrobdella Decora Organism_common: North American Leech Organism_taxid: 6405 Gene: T7 Expression_system: Escherichia Coli Bl21(De3) Expression_system_taxid: 469008 Expression_system_strain: Bl21 Expression_system_variant: De3 Expression_system_vector_type: Plasmid Expression_system_vector: Pet 15b Expression_system_plasmid: E2-M10 Expression_system_gene: T7
symmetry	Space Group: P 1	R_factor 0.189 R_Free 0.229
crystal cell	length a length b length c angle alpha angle beta angle gamma 46.264 69.437 72.319 112.93 95.60 106.86
method	X-Ray Diffraction	resolution	1.80 Å
ligand	CNP	enzyme	Hydrolase E.C.3.2.1.18 BRENDA
related structures	by homologous chain: 1SLL, 3SLI
Gene Ontology	Chain Function Process Component A
Primary reference	The 1.8 A structures of leech intramolecular trans-sialidase complexes: evidence of its enzymatic mechanism., Luo Y, Li SC, Li YT, Luo M, J Mol Biol 1999 Jan 8;285(1):323-32. PMID:9878409

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (119 Kb) [Save to disk] Biological Unit Coordinates (4sli.pdb1.gz) 115 Kb LPC: Ligand-Protein Contacts for 4SLI CSU: Contacts of Structural Units for 4SLI Likely Quarternary Molecular Structure file(s) for 4SLI Structure Factors (450 Kb) Retrieve 4SLI in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 4SLI from S2C, [Save to disk] Re-refined 4sli structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 4SLI 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 4SLI

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 4SLI, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d4sli_2, region 277-759 [Jmol] [rasmolscript] [script source]     - Domain d4sli_1, region 81-276 [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: [4sli_A] [4sli] SWISS-PROT database: [Q27701] Domain organization of [NANL_MACDE] by SWISSPFAM Domain found in 4SLI: [LamG ] by SMART

Other resources with information on 4SLI

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

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