1Q3X	Hydrolase	date	Aug 01, 2003
title	Crystal Structure Of The Catalytic Region Of Human Masp-2
authors	V.Harmat, P.Gal, J.Kardos, K.Szilagyi, G.Ambrus, G.Naray-Szabo, P.
compound		source
Molecule: Mannan-Binding Lectin Serine Protease 2 Chain: A, B Fragment: Ccp2-Sp Synonym: Mannose-Binding Protein Associated Serine Protease 2, Mbl-Associated Serine Protease 2; Ec: 3.4.21.- Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Gene: Masp2 Expression_system: Escherichia Coli Bl21(De3) Expression_system_taxid: 469008 Expression_system_strain: Bl21-De3 Expression_system_vector_type: Plasmid Expression_system_plasmid: Pet-17b
symmetry	Space Group: P 1	R_factor 0.174 R_Free 0.224
crystal cell	length a length b length c angle alpha angle beta angle gamma 40.950 41.521 102.994 96.44 91.77 119.52
method	X-Ray Diffraction	resolution	2.23 Å
ligand	GOL, NA	enzyme	Hydrolase E.C.3.4.21 BRENDA
Gene Ontology	Chain Function Process Component A, B
Primary reference	The structure of MBL-associated serine protease-2 reveals that identical substrate specificities of C1s and MASP-2 are realized through different sets of enzyme-substrate interactions., Harmat V, Gal P, Kardos J, Szilagyi K, Ambrus G, Vegh B, Naray-Szabo G, Zavodszky P, J Mol Biol 2004 Oct 1;342(5):1533-46. PMID:15364579

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (112 Kb) [Save to disk] Biological Unit Coordinates (1q3x.pdb1.gz) 55 Kb Biological Unit Coordinates (1q3x.pdb2.gz) 53 Kb LPC: Ligand-Protein Contacts for 1Q3X CSU: Contacts of Structural Units for 1Q3X Likely Quarternary Molecular Structure file(s) for 1Q3X Structure Factors (362 Kb) Retrieve 1Q3X in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1Q3X from S2C, [Save to disk] Re-refined 1q3x structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1Q3X 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 1Q3X

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 1Q3X, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1q3xa2, region A:366-440 [Jmol] [rasmolscript] [script source]     - Domain d1q3xa1, region A:445-686 [Jmol] [rasmolscript] [script source]     - Domain d1q3xb2, region B:366-440 [Jmol] [rasmolscript] [script source]     - Domain d1q3xb1, region B:445-686 [Jmol] [rasmolscript] [script source]

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [1q3x_B] [1q3x] [1q3x_A] SWISS-PROT database: [O00187] Domain organization of [MASP2_HUMAN] by SWISSPFAM Domains found in 1Q3X: [CCP] [Tryp_SPc ] by SMART

Other resources with information on 1Q3X

Community annotation for 1Q3X at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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