chr7-140734607-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2PP2BP4

The NM_004333.6(BRAF):​c.2291C>T​(p.Pro764Leu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P764S) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 31)

Consequence

BRAF
NM_004333.6 missense

Scores

6
10

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 6.50
Variant links:
Genes affected
BRAF (HGNC:1097): (B-Raf proto-oncogene, serine/threonine kinase) This gene encodes a protein belonging to the RAF family of serine/threonine protein kinases. This protein plays a role in regulating the MAP kinase/ERK signaling pathway, which affects cell division, differentiation, and secretion. Mutations in this gene, most commonly the V600E mutation, are the most frequently identified cancer-causing mutations in melanoma, and have been identified in various other cancers as well, including non-Hodgkin lymphoma, colorectal cancer, thyroid carcinoma, non-small cell lung carcinoma, hairy cell leukemia and adenocarcinoma of lung. Mutations in this gene are also associated with cardiofaciocutaneous, Noonan, and Costello syndromes, which exhibit overlapping phenotypes. A pseudogene of this gene has been identified on the X chromosome. [provided by RefSeq, Aug 2017]

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2
Very rare variant in population databases, with high coverage;
PP2
Missense variant in gene, where missense usually causes diseases (based on misZ statistic), BRAF. . Gene score misZ 3.7208 (greater than the threshold 3.09). Trascript score misZ 4.9447 (greater than threshold 3.09). GenCC has associacion of gene with LEOPARD syndrome 3, anaplastic astrocytoma, Noonan syndrome with multiple lentigines, cardiofaciocutaneous syndrome 1, Noonan syndrome, cardiofaciocutaneous syndrome, Costello syndrome, Noonan syndrome 7.
BP4
Computational evidence support a benign effect (MetaRNN=0.27318084).

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE UniProt
BRAFNM_004333.6 linkuse as main transcriptc.2291C>T p.Pro764Leu missense_variant 18/18 ENST00000646891.2
BRAFNM_001374258.1 linkuse as main transcriptc.2401+10C>T intron_variant ENST00000644969.2

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Appris UniProt
BRAFENST00000646891.2 linkuse as main transcriptc.2291C>T p.Pro764Leu missense_variant 18/18 NM_004333.6 P4
BRAFENST00000644969.2 linkuse as main transcriptc.2401+10C>T intron_variant NM_001374258.1

Frequencies

GnomAD3 genomes
Cov.:
31
GnomAD3 exomes
AF:
0.00000398
AC:
1
AN:
251486
Hom.:
0
AF XY:
0.00
AC XY:
0
AN XY:
135920
show subpopulations
Gnomad AFR exome
AF:
0.0000615
Gnomad AMR exome
AF:
0.00
Gnomad ASJ exome
AF:
0.00
Gnomad EAS exome
AF:
0.00
Gnomad SAS exome
AF:
0.00
Gnomad FIN exome
AF:
0.00
Gnomad NFE exome
AF:
0.00
Gnomad OTH exome
AF:
0.00
GnomAD4 exome
Cov.:
33
GnomAD4 genome
Cov.:
31
Bravo
AF:
0.00000756
ESP6500AA
AF:
0.000227
AC:
1
ESP6500EA
AF:
0.00
AC:
0
ExAC
AF:
0.00000824
AC:
1

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link

Submissions by phenotype

not provided Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingGeneDxJan 12, 2022Missense variants in this gene are often considered pathogenic (HGMD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously reported in association with a BRAF-related disorder; This variant is associated with the following publications: (PMID: 22824468) -
RASopathy Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingInvitaeMay 27, 2022This variant is not present in population databases (gnomAD no frequency). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt BRAF protein function. This variant has not been reported in the literature in individuals affected with BRAF-related conditions. This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 764 of the BRAF protein (p.Pro764Leu). -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
0.14
BayesDel_addAF
Uncertain
0.038
T
BayesDel_noAF
Benign
-0.18
CADD
Uncertain
25
DANN
Uncertain
0.99
DEOGEN2
Uncertain
0.64
D;.
Eigen
Benign
-0.024
Eigen_PC
Benign
0.22
FATHMM_MKL
Uncertain
0.90
D
LIST_S2
Benign
0.75
T;T
M_CAP
Benign
0.012
T
MetaRNN
Benign
0.27
T;T
MetaSVM
Benign
-0.78
T
MutationAssessor
Benign
0.90
L;.
MutationTaster
Benign
1.0
D
PrimateAI
Uncertain
0.73
T
REVEL
Uncertain
0.31
Polyphen
0.0020
B;.
MVP
0.77
MPC
0.97
ClinPred
0.94
D
GERP RS
5.8
Varity_R
0.16

Splicing

Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
0.0
Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs139420557; hg19: chr7-140434407; API