RGD Reference Report - Compound heterozygous protein C deficiency in a family with venous thrombosis: Identification and in vitro study of p.Asp297His and p.Val420Leu mutations. - Rat Genome Database

Send us a Message



Submit Data |  Help |  Video Tutorials |  News |  Publications |  Download |  REST API |  Citing RGD |  Contact   

Compound heterozygous protein C deficiency in a family with venous thrombosis: Identification and in vitro study of p.Asp297His and p.Val420Leu mutations.

Authors: Liu, H  Wang, HF  Tang, L  Yang, Y  Wang, QY  Zeng, W  Wu, YY  Cheng, ZP  Hu, B  Guo, T  Hu, Y 
Citation: Liu H, etal., Gene. 2015 May 25;563(1):35-40. doi: 10.1016/j.gene.2015.03.002. Epub 2015 Mar 4.
RGD ID: 11099989
Pubmed: (View Article at PubMed) PMID:25748729
DOI: Full-text: DOI:10.1016/j.gene.2015.03.002

Hereditary protein C deficiency (PCD) is an autosomal inherited disorder associated with high risk for venous thromboembolism (VTE). This study aimed to explore the functional consequences of two missense mutations, p.Asp297His and p.Val420Ile, responsible for type I/II PCD and recurrent deep vein thrombosis (DVT) in a Chinese family. The plasma protein C activities (PC:A) of the proband and his sister were reduced to 4% and 5% of normal activity. However, protein C antigen (PC:Ag) concentrations were not equally decreased, with levels of 90.5% and 88.7%, respectively. Two missense mutations p.Asp297His and p.Val420Leu were identified in the protein C gene (PROC). The PC:A and PC:Ag levels in heterozygous state for p.Asp297His were 66% and 64.8%, whereas in heterozygous state for p.Val420Leu, these levels were 67% and 145%, respectively. Wild type (WT) and two mutant PROC cDNA expression plasmids were constructed and transfected into HEK 293T cells. Western blot analysis revealed that both p.Asp297His and p.Val420Leu showed a normal intracellular protein level. The extracellular protein level and specific activity of p.Asp297His were equally reduced to 37.7 +/- 4.3% and 22.1 +/- 2.5%, respectively. Mutant p.Val420Leu showed a relatively higher PC:Ag level and undetectable PC:A. Immunofluorescence staining revealed that WT and p.Val420Leu proteins were largely co-localized with both the protein disulfide isomerase (PDI) and cis-Golgi Marker (GM130), while the PC p.Asp297His mutant protein was mainly co-localized with PDI and much less co-localized with GM130. The thrombosis symptom in this family was associated with the two missense mutations in the PROC gene.

Annotation

Disease Annotations    
Venous Thrombosis  (IAGP,ISO)

Phenotype Annotations    

Human Phenotype
Objects Annotated

Genes (Rattus norvegicus)
Proc  (protein C, inactivator of coagulation factors Va and VIIIa)

Genes (Mus musculus)
Proc  (protein C)

Genes (Homo sapiens)
PROC  (protein C, inactivator of coagulation factors Va and VIIIa)


Additional Information