2BFV

MONOCLONAL ANTIBODY FRAGMENT FV4155 FROM E. COLI

• PDB DOI: https://doi.org/10.2210/pdb2BFV/pdb

• Classification: IMMUNOGLOBULIN
• Organism(s): Mus musculus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1997-05-27 Released: 1997-12-03 
• Deposition Author(s): Trinh, C.H., Phillips, S.E.V.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Work: 0.187 

Literature

Antibody fragment Fv4155 bound to two closely related steroid hormones: the structural basis of fine specificity.

Trinh, C.H., Hemmington, S.D., Verhoeyen, M.E., Phillips, S.E.

(1997) Structure 5: 937-948

• PubMed: 9261086 
• DOI: https://doi.org/10.1016/s0969-2126(97)00247-5
• Primary Citation of Related Structures:  
  1BFV, 1CFV, 2BFV


• PubMed Abstract: 
  

  The concentration of steroid glucuronides in serial samples of early morning urine (EMU) can be used to predict the fertile period in the female menstrual cycle. The monoclonal antibody 4155 has been used as a convenient means of measuring the concentration of steroid glucuronides in EMU, as it specifically recognises the steroid hormone estrone beta-D-glucuronide (E3G), with very high affinity, and the closely related hormone estriol 3-(beta-d-glucuronide) (EI3G), with reduced affinity. Although 4115 binds these hormones with different affinities, EI3G differs from E3G only in the addition of a hydroxyl group and reduction of an adjacent carbonyl. To investigate the structural basis of this fine binding specificity, we have determined the crystal structures of the variable fragment (Fv) of 4155 in complex with each of these hormones.

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Organizational Affiliation: 

Department of Biochemistry and Molecular Biology, University of Leeds, UK.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 Pseudo Symmetry: Cyclic - C2  (Explore in 3D)
Pseudo Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 26.09 kDa 
• Atom Count: 1,877 
• Modelled Residue Count: 231 
• Deposited Residue Count: 232 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
FV4155	A [auth L]	113	Mus musculus	Mutation(s): 0
UniProt
Find proteins for P01631 (Mus musculus) Explore P01631  Go to UniProtKB:  P01631

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
FV4155	B [auth H]	119	Mus musculus	Mutation(s): 0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
STG	C [auth H]	ESTRIOL 3-(B-D-GLUCURONIDE) C24 H32 O9 UZKIAJMSMKLBQE-JRSYHJKYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Work: 0.187 
• Space Group: P 3₂

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 53.6	α = 90
b = 53.6	β = 90
c = 83.8	γ = 120

Software Package:

Software Name	Purpose
MOSFLM	data reduction
ROTAVATA	data reduction
AMoRE	phasing
PROLSQ	refinement
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-12-03 
Deposition Author(s): Trinh, C.H., Phillips, S.E.V.

Revision History  

• Version 1.0: 1997-12-03
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2023-08-09
  Changes: Database references, Derived calculations, Refinement description