Structure of PDB 4lxb Chain H

Receptor sequence

>4lxbH (length=250) Species: 9606 (Homo sapiens)

IVEGSDAEIGMSPWQVMLFRKSPQELLCGASLISDRWVLTAAHCLLYPPW
DKNFTENDLLVRIGKHSRTRYERNIEKISMLEKIYIHPRYNWRENLDRDI
ALMKLKKPVAFSDYIHPVCLPDRETAASLLQAGYKGRVTGWGNLKETGQP
SVLQVVNLPIVERPVCKDSTRIRITDNMFCAGYKPDEGKRGDACEGDSGG
PFVMKSPFNNRWYQMGIVSWGEGCDRDGKYGFYTHVFRLKKWIQKVIDQF

3D structure

• PDB: 4lxb 5-Chlorothiophene-2-carboxylic acid [(S)-2-[2-methyl-3-(2-oxopyrrolidin-1-yl)benzenesulfonylamino]-3-(4-methylpiperazin-1-yl)-3-oxopropyl]amide (SAR107375), a selective and potent orally active dual thrombin and factor Xa inhibitor.
• Chain: H
• Resolution: 1.61 Å

Enzymatic activity

• Enzyme Commision number: 3.4.21.5: thrombin.

Interaction with ligand

Site #	Ligand	Ligand chain	Binding residues on receptor (original residue number in PDB)	Binding residues on receptor (residue number reindexed from 1)	Binding affinity
BS01	peptide	H	F34 L65 R67 R73 T74 R75 Y76 K81 I82	F19 L60 R62 R68 T69 R70 Y71 K77 I78
BS02	peptide	H	E23 I24 G25 M26 P28 W29 D116 H119 P120 C122 Y134 K135 R137 N159 M201 K202 N205 R206 W207	E8 I9 G10 M11 P13 W14 D113 H116 P117 C119 Y134 K135 R137 N157 M204 K205 N210 R211 W212
BS03	7R9	H	H57 Y60A W60D E97A N98 I174 D189 A190 V213 W215 G216 E217 G219 G226 F227 Y228	H43 Y47 W50 E94 N95 I172 D192 A193 V218 W220 G221 E222 G223 G231 F232 Y233	MOAD: ic50=7nM PDBbind-CN: -logKd/Ki=8.15,IC50=7nM

Gene Ontology

Molecular Function

• GO:0004252 serine-type endopeptidase activity
• GO:0005509 calcium ion binding

Biological Process

• GO:0006508 proteolysis
• GO:0007596 blood coagulation

External links

• PDB: RCSB:4lxb, PDBe:4lxb, PDBj:4lxb
• PDBsum: 4lxb
• PubMed: 24175584
• UniProt: P00734|THRB_HUMAN Prothrombin (Gene Name=F2)