CALR c.1194G>T, p.Glu398Asp

NM_004343.3:c.1194G>T
COSM1738023

Classification Summary

Variant of Uncertain Significance (VUS)

The NM_004343.3:c.1194G>T variant in the CALR gene is classified as a Variant of Uncertain Significance (VUS). This classification is supported by the application of PM2 and BP4 criteria, indicating the variant is extremely rare and computational evidence suggests a benign impact. Additional evidence is needed to evaluate other criteria.

Population Frequency
0.00638%
Low Frequency
ClinVar Classification
Unknown
0 publications
REVEL Score
0.109
Likely Benign
COSMIC Recurrence
2 occurrences
No Criteria Applied
Classification Evidence
Very Strong (PVS)
None applied
Strong (PS/BS)
None applied
Moderate (PM/BA)
PM2
Supporting (PP/BP)
BP4
Created: 2025-04-07T11:11:12.344798

Genetic Information

Gene & Transcript Details
Gene
CALR
Transcript
NM_004343.4 MANE Select
Total Exons
9
Strand
Forward (+)
Reference Sequence
NC_000019.9
Alternative Transcripts
ID Status Details
NM_004343.3 RefSeq Select 9 exons | Forward
NM_004343.2 Alternative 9 exons | Forward
Variant Details
HGVS Notation
NM_004343.3:c.1194G>T
Protein Change
E398D
Location
Exon 9 (Exon 9 of 9)
9
5' Exon Structure (9 total) 3'
Functional Consequence
Missense Variant
Related Variants
No evidence of other pathogenic variants at position 398 in gene CALR
Alternate Identifiers
COSM1738023
Variant interpretation based on transcript NM_004343.4

Clinical Evidence

Population Frequency
Global Frequency
0.00638%
Rare
Highest in Population
African/African American
0.0115%
Low Frequency
Global: 0.00638%
African/African American: 0.0115%
0%
0.0005%
0.001%
0.01%
0.05%
1%+
Allele Information
Total: 31356 Alt: 2 Homozygotes: 0
ACMG Criteria Applied
PM2
This variant is rare in the population (0.006380% MAF).
ClinVar 2025-04-07T11:10:02.037728
Classification
Unknown
Publications
0 publications
Clinical Statement
COSMIC
COSMIC ID
COSM1738023
Recurrence
2 occurrences
PM1 Criteria
Not Applied
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Functional Domain
Hotspot Status
Not a hotspot
Domain Summary

This variant is not located in a mutational hotspot or critical domain (0 mutations).

Related Variants in This Domain
No evidence of other pathogenic variants at position 398 in gene CALR

Functional Studies

Functional Impact
Summary
The variant CALR E398D has not been functionally characterized in the provided sources.

Computational Evidence

Pathogenicity Predictions
REVEL Score
0.109
0.109
Likely Benign 0.0
Uncertain (Low) 0.2
Uncertain (Med) 0.5
Likely Pathogenic 0.75
REVEL scores ≥ 0.75 are considered strong evidence of pathogenicity (PP3)
Predictor Consensus
Unknown
PP3 Applied
No
SpliceAI Scores Window: ±500bp
Effect Type Score Position
- Acceptor Loss
0.0
-110 bp
- Donor Loss
0.0
-110 bp
+ Acceptor Gain
0.0
-133 bp
+ Donor Gain
0.0
-452 bp
High impact (≥0.5)
Medium impact (0.2-0.49)
Low impact (<0.2)

VCEP Guidelines

Applied ACMG/AMP Criteria
PM2
PM2 (Moderate)
According to standard ACMG guidelines: 'PM2 – Absent from controls (or at extremely low frequency if recessive)'. The evidence for this variant shows: The variant has a minor allele frequency (MAF) of 0.00638% in gnomAD, indicating it is extremely rare. Therefore, this criterion meets the requirements because the variant is absent from controls or present at a very low frequency.
BP4
BP4 (Supporting)
According to standard ACMG guidelines: 'BP4 – Multiple lines of computational evidence suggest no impact'. The evidence for this variant shows: The REVEL score is 0.11, which is below the threshold of 0.15, and SpliceAI analysis indicates no predicted impact on splicing. Therefore, this criterion meets the requirements because the computational evidence suggests a benign impact.