2Q3N	Plant Protein	date	May 30, 2007
title	Agglutinin From Abrus Precatorius (Apa-I)
authors	A.Bagaria, K.Surendranath, U.A.Ramagopal, S.Ramakumar, A.A.Karan
compound		source
Molecule: Agglutinin-1 A Chain Chain: A Fragment: Residues 21-280 Ec: 3.2.2.22		Organism_scientific: Abrus Precatorius Organism_common: Indian Licorice Organism_taxid: 3816
Molecule: Agglutinin-1 B Chain Chain: B Fragment: Residues 281-547		Organism_scientific: Abrus Precatorius Organism_common: Indian Licorice Organism_taxid: 3816
symmetry	Space Group: P 42 21 2	R_factor 0.195 R_Free 0.255
crystal cell	length a length b length c angle alpha angle beta angle gamma 141.122 141.122 105.253 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	3.50 Å
ligand	NAG	enzyme	Hydrolase E.C.3.2.2.22 BRENDA
note	2Q3N supersedes 2AMZ
Gene Ontology	Chain Function Process Component A B
Primary reference	Structure-function analysis and insights into the reduced toxicity of Abrus precatorius agglutinin I in relation to abrin., Bagaria A, Surendranath K, Ramagopal UA, Ramakumar S, Karande AA, J Biol Chem. 2006 Nov 10;281(45):34465-74. Epub 2006 Jun 13. PMID:16772301

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (85 Kb) [Save to disk] Biological Unit Coordinates (2q3n.pdb1.gz) 153 Kb Biological Unit Coordinates (2q3n.pdb2.gz) 78 Kb LPC: Ligand-Protein Contacts for 2Q3N CSU: Contacts of Structural Units for 2Q3N Likely Quarternary Molecular Structure file(s) for 2Q3N Structure Factors (169 Kb) Retrieve 2Q3N in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 2Q3N from S2C, [Save to disk] Re-refined 2q3n structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 2Q3N 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 2Q3N

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 2Q3N, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [2q3n_B] [2q3n_A] [2q3n] SWISS-PROT database: [Q9M6E9] Domain organization of [AGGL_ABRPR] by SWISSPFAM Domain found in 2Q3N: [RICIN ] by SMART

Other resources with information on 2Q3N

Community annotation for 2Q3N at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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