Evidence map›Paper›PMID 25651845›Full record

ArticleBlood2015

Protein C Thr315Ala variant results in gain of function but manifests as type II deficiency in diagnostic assays.

Qiulan Ding, Likui Yang, Peyman Dinarvand, Xuefeng Wang, Alireza R Rezaie

Open access · bronzeAbstract read
In one paragraph

Article in Blood, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
1.1field-weighted citation impact, top 22% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

16 citing papers in PubMed, 29 citations in OpenAlex.

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  6. Role of Gly197 in the structure and function of protein C.Biochimica et biophysica acta. General subjects · 2021
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 2 countries.

Qiulan DingDepartment of Laboratory Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China; and.
Likui YangEdward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO.
Peyman DinarvandEdward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO.
Xuefeng WangDepartment of Laboratory Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China; and.
Alireza R RezaieEdward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO.
Saint Louis University · USRuijin Hospital · CN

Funding

Protease Activated Receptor Signaling by Coagulation ProteasesR01HL101917 · NHLBI · SAINT LOUIS UNIVERSITY · PI Lijun Xia · 2010 to 2026
$6.6M
Molecular Basis of Coagulation Protease SpecificityR01HL068571 · NHLBI · SAINT LOUIS UNIVERSITY · PI REZAIE, ALIREZA R. · 2002 to 2010
$3.1M
NHLBI NIH HHS HL 101917NHLBI NIH HHS HL 68571NHLBI NIH HHS R01 HL068571NHLBI NIH HHS R01 HL101917
6 · The paper itself

Abstract

Protein C (PC) is a vitamin K-dependent plasma glycoprotein, which upon activation by thrombin in complex with thrombomodulin (TM), regulates the coagulation cascade through a feedback loop inhibition mechanism. PC deficiency is associated with an increased risk of venous thromboembolism (VTE). A recent cohort study aimed at establishing a normal PC range identified a healthy PC-deficient subject whose PC antigen level of 65% and activity levels of 50% (chromogenic assay) and 36% (clotting assay) were markedly low. The proband has a negative family history of VTE. Genetic analysis revealed the proband has a heterozygous missense mutation in which Thr-315 of the PC heavy chain has been substituted with Ala. We expressed this mutant in HEK-293 cells and purified it to homogeneity. A similar decrease in both anticoagulant and anti-inflammatory activities of the activated protein C mutant was observed in plasma- and cell-based assays. Interestingly, we discovered if functional assays were coupled to PC activation by the thrombin-TM complex, the variant exhibits improved activities in all assays. Sequence analysis revealed Thr-315 is a consensus N-linked glycosylation site for Asn-313 and that its elimination significantly (∼four- to fivefold) improves the maximum velocity of PC activation by the thrombin-TM complex, explaining the basis for the proband's negative VTE pedigree.

Indexed as

Point MutationAdultBlood CoagulationBlood Coagulation TestsCohort StudiesFemaleHEK293 CellsHumansProtein CProtein C DeficiencyThrombinThrombomodulinProtein CThrombinThrombomodulin

Identifiers

PMID25651845
PMCPMC4392011
OpenAlexW2050440936

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.