4-186274239-C-T
Variant summary
Our verdict is Pathogenic. The variant received 15 ACMG points: 15P and 0B. PM1PP2PP3_StrongPP5_Very_Strong
The NM_000128.4(F11):c.449C>T(p.Thr150Met) variant causes a missense change. The variant allele was found at a frequency of 0.00000743 in 1,614,078 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T150A) has been classified as Uncertain significance.
Frequency
Consequence
NM_000128.4 missense
Scores
Clinical Significance
Conservation
Publications
- congenital factor XI deficiencyInheritance: AD, AR, SD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), ClinGen
 
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ACMG classification
Our verdict: Pathogenic. The variant received 15 ACMG points.
Transcripts
RefSeq
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt | 
|---|---|---|---|---|---|---|---|---|---|---|
| F11 | ENST00000403665.7  | c.449C>T | p.Thr150Met | missense_variant | Exon 5 of 15 | 1 | NM_000128.4 | ENSP00000384957.2 | ||
| F11 | ENST00000492972.6  | c.449C>T | p.Thr150Met | missense_variant | Exon 5 of 5 | 2 | ENSP00000424479.1 | |||
| F11 | ENST00000514715.1  | n.321C>T | non_coding_transcript_exon_variant | Exon 2 of 2 | 3 | 
Frequencies
GnomAD3 genomes   AF:  0.0000131  AC: 2AN: 152186Hom.:  0  Cov.: 33 show subpopulations 
GnomAD2 exomes  AF:  0.00000398  AC: 1AN: 251286 AF XY:  0.00   show subpopulations 
GnomAD4 exome  AF:  0.00000684  AC: 10AN: 1461892Hom.:  0  Cov.: 31 AF XY:  0.00000688  AC XY: 5AN XY: 727248 show subpopulations 
Age Distribution
GnomAD4 genome   AF:  0.0000131  AC: 2AN: 152186Hom.:  0  Cov.: 33 AF XY:  0.0000135  AC XY: 1AN XY: 74344 show subpopulations 
Age Distribution
ClinVar
Submissions by phenotype
Hereditary factor XI deficiency disease    Pathogenic:3Uncertain:1 
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This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -
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The p.Thr150Met variant in F11 has been reported in one heterozygous individual and one compound heterozygous individual both with Factor XI defieciency (Mitchell 2006 PMID: 16835901, Saunders 2009 PMID: 19652879), and Factor XI assays for both individuals showed dimished activity. The variant has been in 0.02% (1/4828) South Asian chromosomes by gnomAD (https://gnomad.broadinstitute.org/); however this frequency is low enough to be consistent with a carrier frequency for pathogenic F11 variants. Computational prediction tools and conservation analysis suggest that the p.Thr150Met variant may impact the protein, though this information is not predictive enough to determine pathogenicity. In summary, although additional studies are required to fully establish its clinical significance, this variant meets criteria to be classified as likely pathogenic for autosomal dominant Factor XI deficiency. ACMG/AMP Criteria applied: PS3, PM3, PP3, PS4_Supporting. -
Computational scores
Source: 
Splicing
 Find out detailed SpliceAI scores and Pangolin per-transcript scores at