Toggle navigation
About
What is Reactome ?
News
Team
Scientific Advisory Board
Funding
Editorial Calendar
Release Calendar
Statistics
Our Logo
License Agreement
Privacy Notice
Disclaimer
Digital Preservation
Contact us
Content
Table of Contents
DOIs
Data Schema
Reactome Research Spotlight
ORCID Integration Project
COVID-19 Disease Pathways
Docs
Userguide
Pathway Browser
How do I search ?
Details Panel
Analysis Tools
Analysis Data
Analysis Gene Expression
Species Comparison
Tissue Distribution
Diseases
Cytomics
Review Status of Reactome Events
ReactomeFIViz
Developer's Zone
Graph Database
Analysis Service
Content Service
Pathways Overview
Pathway Diagrams
Icon Info
EHLD Specs & Guidelines
Icon Library Guidelines
Data Model
Curator Guide
Release Documentation
Computationally inferred events
FAQ
Linking to Us
Citing us
Tools
Pathway Browser
Analyse gene list
Analyse gene expression
Species Comparison
Tissue Distribution
Analysis Service
Content Service
ReactomeFIViz
Advanced Data Search
Site Search
Community
Contribute Pathway Knowledge
Icon Library
Outreach
Events
Publications
Partners
Contributors
Resources Guide
Download
About
What is Reactome ?
News
Team
Scientific Advisory Board
Funding
Editorial Calendar
Release Calendar
Statistics
Our Logo
License Agreement
Privacy Notice
Disclaimer
Digital Preservation
Contact us
Content
Table of Contents
DOIs
Data Schema
Reactome Research Spotlight
ORCID Integration Project
COVID-19 Disease Pathways
Docs
Userguide
Pathway Browser
How do I search ?
Details Panel
Analysis Tools
Analysis Data
Analysis Gene Expression
Species Comparison
Tissue Distribution
Diseases
Cytomics
Review Status of Reactome Events
ReactomeFIViz
Developer's Zone
Graph Database
Analysis Service
Content Service
Pathways Overview
Pathway Diagrams
Icon Info
EHLD Specs & Guidelines
Icon Library Guidelines
Data Model
Curator Guide
Release Documentation
Computationally inferred events
FAQ
Linking to Us
Citing us
Tools
Pathway Browser
Analyse gene list
Analyse gene expression
Species Comparison
Tissue Distribution
Analysis Service
Content Service
ReactomeFIViz
Advanced Data Search
Site Search
Community
Contribute Pathway Knowledge
Icon Library
Outreach
Events
Publications
Partners
Contributors
Resources Guide
Download
Search ...
Go!
SERPINA5 binds activated protein C
Stable Identifier
R-HSA-5591086
Type
Reaction [binding]
Species
Homo sapiens
Compartment
extracellular region
ReviewStatus
5/5
Locations in the PathwayBrowser
Expand all
Hemostasis (Homo sapiens)
Formation of Fibrin Clot (Clotting Cascade) (Homo sapiens)
Common Pathway of Fibrin Clot Formation (Homo sapiens)
SERPINA5 binds activated protein C (Homo sapiens)
General
SBML
|
BioPAX
Level 2
Level 3
|
PDF
SVG
|
PNG
Low
Medium
High
|
PPTX
|
SBGN
Click the image above or
here
to open this reaction in the Pathway Browser
The layout of this reaction may differ from that in the pathway view due to the constraints in pathway layout
SERPINA5, also called Plasma serine protease inhibitor or Protein C inhibitor, inactivates serine proteases by binding irreversibly to their serine activation site. It is involved in the regulation of intravascular and extravascular proteolytic activities, promoting coagulation by inhibiting the anticoagulant complex Activated protein C (APC), but also acts as an anticoagulant factor by inhibiting blood coagulation factors such as prothrombin, factor XI, factor Xa, plasma kallikrein and fibrinolytic enzymes such as tissue- and urinary-type plasminogen activators. Its inhibitory activity is greatly enhanced in the presence of glycosaminoglycans (GAGs), heparin, thrombomodulin and phospholipids vesicles (Suzuki et al. 1985).
SERPINA5 inhibits activated protein C In the blood plasma and inhibits thromibin as part of the thrombin:thrombomodulin complex (Rezaie et al. 1995). On the other hand, PCI can also inhibit coagulation factors (Radtke et al. 2007). The SERPINA5:APC complex is a marker of thrombotic events (Kolbel et al. 2006), which suggests that despite low circulating SERPINA5 concentrations and rates of APC inhibition, its predominant role is procoagulatory (Li & Huntington 2008). This is due to the enhancing effect of GAGs, which line the vascular endothelium. Both SERPINA5 and APC bind to GAGs. The presence of heparin in vitro accelerates the maximal rate of inhibition by over 2000-fold (when accounting for dissociation constants) (Yang et al. 2002).
Literature References
PubMed ID
Title
Journal
Year
6323392
Mechanism of inhibition of activated protein C by protein C inhibitor
Kusumoto, H
,
Hashimoto, S
,
Suzuki, K
,
Nishioka, J
J. Biochem.
1984
Participants
Input
Activated protein C [extracellular region]
(Homo sapiens)
SERPINA5 [extracellular region]
(Homo sapiens)
Output
SERPINA5:Activated protein C [extracellular region]
(Homo sapiens)
Participates
as an event of
Common Pathway of Fibrin Clot Formation (Homo sapiens)
This event is regulated
Positively by
Regulator
GAG [plasma membrane]
Orthologous Events
SERPINA5 binds activated protein C (Bos taurus)
SERPINA5 binds activated protein C (Canis familiaris)
SERPINA5 binds activated protein C (Danio rerio)
SERPINA5 binds activated protein C (Mus musculus)
SERPINA5 binds activated protein C (Rattus norvegicus)
SERPINA5 binds activated protein C (Sus scrofa)
SERPINA5 binds activated protein C (Xenopus tropicalis)
Authored
Jupe, S (2014-07-14)
Reviewed
Mumford, D (2014-09-11)
Created
Jupe, S (2014-06-11)
© 2025
Reactome
Cite Us!
Cite Us!
Cite Us!
Warning!
Unable to extract citation. Please try again later.
Download As:
BibTeX
RIS
Text