1XX9

Crystal Structure of the FXIa Catalytic Domain in Complex with EcotinM84R

• PDB DOI: https://doi.org/10.2210/pdb1XX9/pdb

• Classification: BLOOD CLOTTING/HYDROLASE INHIBITOR
• Organism(s): Homo sapiens, Escherichia coli
• Expression System: Komagataella pastoris, Escherichia coli BL21
• Mutation(s): Yes 


• Deposited: 2004-11-04 Released: 2004-11-16 
• Deposition Author(s): Jin, L., Pandey, P., Babine, R.E., Gorga, J.C., Seidl, K.J., Gelfand, E., Weaver, D.T., Abdel-Meguid, S.S., Strickler, J.E.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.285 
• R-Value Work: 0.235 

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 4-mer - A2B2 

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

Macromolecule Content

• Total Structure Weight: 86.26 kDa 
• Atom Count: 6,244 
• Modelled Residue Count: 749 
• Deposited Residue Count: 760 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Coagulation factor XI	A, B	238	Homo sapiens	Mutation(s): 0  Gene Names: F11 EC: 3.4.21.27
UniProt & NIH Common Fund Data Resources
Find proteins for P03951 (Homo sapiens) Explore P03951  Go to UniProtKB:  P03951
PHAROS:  P03951 GTEx:  ENSG00000088926

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Ecotin	C, D	142	Escherichia coli	Mutation(s): 1  Gene Names: eco, eti
UniProt
Find proteins for P23827 (Escherichia coli (strain K12)) Explore P23827  Go to UniProtKB:  P23827

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	E [auth A]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.285 
• R-Value Work: 0.235 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 44.615	α = 90
b = 92.669	β = 90
c = 186.921	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
SCALEPACK	data scaling
AMoRE	phasing
CNX	refinement
HKL-2000	data reduction

Structure Validation

Entry History 

Deposition Data

• Released Date: 2004-11-16 
Deposition Author(s): Jin, L., Pandey, P., Babine, R.E., Gorga, J.C., Seidl, K.J., Gelfand, E., Weaver, D.T., Abdel-Meguid, S.S., Strickler, J.E.

Revision History  

• Version 1.0: 2004-11-16
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Non-polymer description, Version format compliance
• Version 1.3: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Data collection, Derived calculations, Structure summary
• Version 1.4: 2021-10-20
  Changes: Database references, Structure summary
• Version 1.5: 2023-08-23
  Changes: Data collection, Refinement description