1X9Q	Immune System	date	Aug 24, 2004
title	4m5.3 Anti-Fluorescein Single Chain Antibody Fragment (Scfv)
authors	K.S.Midelfort, H.H.Hernandez, S.M.Lippow, B.Tidor, C.L.Drennan, K.D.Wittrup
compound		source
Molecule: 4m5.3 Anti-Fluorescein Single Chain Antibody Frag Chain: A Fragment: Antibody Binding Fragment Synonym: Scfv Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Expression_system: Saccharomyces Cerevisiae Expression_system_common: Baker'S Yeast Expression_system_taxid: 4932 Expression_system_strain: Yvh10 Expression_system_vector_type: Prs316 Expression_system_plasmid: Gal1-10 Promoter
symmetry	Space Group: P 21 21 21	R_factor 0.165 R_Free 0.193
crystal cell	length a length b length c angle alpha angle beta angle gamma 55.780 57.450 79.220 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	1.50 Å
ligand	ACT, FLU	enzyme
related structures	by homologous chain: 1EEQ, 1RUR, 2DLF
Primary reference	Substantial energetic improvement with minimal structural perturbation in a high affinity mutant antibody., Midelfort KS, Hernandez HH, Lippow SM, Tidor B, Drennan CL, Wittrup KD, J Mol Biol 2004 Oct 22;343(3):685-701. PMID:15465055

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (85 Kb) [Save to disk] Biological Unit Coordinates (1x9q.pdb1.gz) 80 Kb LPC: Ligand-Protein Contacts for 1X9Q CSU: Contacts of Structural Units for 1X9Q Likely Quarternary Molecular Structure file(s) for 1X9Q Structure Factors (475 Kb) Retrieve 1X9Q in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1X9Q from S2C, [Save to disk] Re-refined 1x9q structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1X9Q 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 1X9Q

Ramachandran plot from PDBSum

Structure-derived information

Conformational Epitope Prediction for 1X9Q from the CEP Server. Electron Density related parameters from EDS Electron Density Server, at Upsala Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1X9Q, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [1x9q_A] [1x9q] SWISS-PROT database: Domain organization of by SWISSPFAM Domain found in 1X9Q: [IGv ] by SMART

Other resources with information on 1X9Q

Community annotation for 1X9Q at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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