rs780382854
Variant summary
Our verdict is Likely benign. Variant got -1 ACMG points: 1P and 2B. PP2BP4_Moderate
The NM_000222.3(KIT):c.1312A>G(p.Ile438Val) variant causes a missense change. The variant allele was found at a frequency of 0.00000558 in 1,613,846 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)
Exomes 𝑓: 0.0000055 ( 0 hom. )
Consequence
KIT
NM_000222.3 missense
NM_000222.3 missense
Scores
2
16
Clinical Significance
Conservation
PhyloP100: 5.45
Genes affected
KIT (HGNC:6342): (KIT proto-oncogene, receptor tyrosine kinase) This gene encodes a receptor tyrosine kinase. This gene was initially identified as a homolog of the feline sarcoma viral oncogene v-kit and is often referred to as proto-oncogene c-Kit. The canonical form of this glycosylated transmembrane protein has an N-terminal extracellular region with five immunoglobulin-like domains, a transmembrane region, and an intracellular tyrosine kinase domain at the C-terminus. Upon activation by its cytokine ligand, stem cell factor (SCF), this protein phosphorylates multiple intracellular proteins that play a role in in the proliferation, differentiation, migration and apoptosis of many cell types and thereby plays an important role in hematopoiesis, stem cell maintenance, gametogenesis, melanogenesis, and in mast cell development, migration and function. This protein can be a membrane-bound or soluble protein. Mutations in this gene are associated with gastrointestinal stromal tumors, mast cell disease, acute myelogenous leukemia, and piebaldism. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2020]
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ACMG classification
Classification made for transcript
Verdict is Likely_benign. Variant got -1 ACMG points.
PP2
?
Missense variant where missense usually causes diseases, KIT
BP4
?
Computational evidence support a benign effect (MetaRNN=0.19166481).
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
KIT | NM_000222.3 | c.1312A>G | p.Ile438Val | missense_variant | 8/21 | ENST00000288135.6 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
KIT | ENST00000288135.6 | c.1312A>G | p.Ile438Val | missense_variant | 8/21 | 1 | NM_000222.3 | P4 |
Frequencies
GnomAD3 genomes ? AF: 0.00000657 AC: 1AN: 152190Hom.: 0 Cov.: 32
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GnomAD3 exomes AF: 0.00000796 AC: 2AN: 251386Hom.: 0 AF XY: 0.0000147 AC XY: 2AN XY: 135862
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GnomAD4 exome AF: 0.00000547 AC: 8AN: 1461538Hom.: 0 Cov.: 30 AF XY: 0.00000825 AC XY: 6AN XY: 727110
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GnomAD4 genome ? AF: 0.00000657 AC: 1AN: 152308Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1AN XY: 74476
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ClinVar
Significance: Conflicting classifications of pathogenicity
Submissions summary: Uncertain:3Benign:1
Revision: criteria provided, conflicting classifications
LINK: link
Submissions by phenotype
Gastrointestinal stromal tumor Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Mar 22, 2023 | 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. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Benign"; Align-GVGD: "Not Available". The valine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. ClinVar contains an entry for this variant (Variation ID: 573755). This variant has not been reported in the literature in individuals affected with KIT-related conditions. This variant is present in population databases (rs780382854, gnomAD 0.006%). This sequence change replaces isoleucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 438 of the KIT protein (p.Ile438Val). - |
Uncertain significance, criteria provided, single submitter | clinical testing | Baylor Genetics | May 10, 2023 | - - |
Hereditary cancer-predisposing syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Jul 16, 2021 | The p.I438V variant (also known as c.1312A>G), located in coding exon 8 of the KIT gene, results from an A to G substitution at nucleotide position 1312. The isoleucine at codon 438 is replaced by valine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. - |
Ovarian cancer Benign:1
Benign, criteria provided, single submitter | clinical testing | Laboratory of Molecular Epidemiology of Birth Defects, West China Second University Hospital, Sichuan University | Jan 01, 2022 | - - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
Cadd
Benign
Dann
Benign
Eigen
Benign
Eigen_PC
Benign
FATHMM_MKL
Uncertain
D
LIST_S2
Benign
T;T
M_CAP
Benign
T
MetaRNN
Benign
T;T
MetaSVM
Benign
T
MutationAssessor
Uncertain
M;M
MutationTaster
Benign
D;D
PrimateAI
Benign
T
PROVEAN
Benign
N;N
REVEL
Benign
Sift
Benign
T;T
Sift4G
Benign
T;T
Polyphen
B;B
Vest4
MutPred
Loss of glycosylation at T437 (P = 0.0477);Loss of glycosylation at T437 (P = 0.0477);
MVP
MPC
0.38
ClinPred
T
GERP RS
Varity_R
gMVP
Splicing
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Score
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at