rs992027457

Variant names:

• chr4-54731384-C-T
• rs992027457
• NM_000222.3:c.2198C>T

Your query was ambiguous. Multiple possible variants found:

• chr4-54731384-C-T
• chr4-54731384-C-A
• chr4-54731384-C-G

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 1P and 4B. PP2 BS2

The NM_000222.3(KIT):​c.2198C>T​(p.Pro733Leu) variant causes a missense change. The variant allele was found at a frequency of 0.00000958 in 1,461,100 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000096 (0 hom.)
• Consequence: KIT NM_000222.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:5
• Conservation: PhyloP100: 4.03
• Publications: 4 publications found

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]

KIT Gene-Disease associations (from GenCC):

• gastrointestinal stromal tumor

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, ClinGen, Genomics England PanelApp, Orphanet, Labcorp Genetics (formerly Invitae)
• piebaldism

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Ambry Genetics, G2P, Orphanet, Labcorp Genetics (formerly Invitae)
• cutaneous mastocytosis

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• mastocytosis

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: Genomics England PanelApp, Ambry Genetics

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PP2: Missense variant in the KIT gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 54 curated pathogenic missense variants (we use a threshold of 10). The gene has 7 curated benign missense variants. Gene score misZ: 2.5806 (below the threshold of 3.09). Trascript score misZ: 4.1549 (above the threshold of 3.09). GenCC associations: The gene is linked to cutaneous mastocytosis, gastrointestinal stromal tumor, mastocytosis, piebaldism.
• BS2: High AC in GnomAdExome4 at 14 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000222.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KIT	NM_000222.3	MANE Select	c.2198C>T	p.Pro733Leu	missense	Exon 15 of 21	NP_000213.1	P10721-1
	KIT	NM_001385284.1		c.2201C>T	p.Pro734Leu	missense	Exon 15 of 21	NP_001372213.1	A0A8I5KS03
	KIT	NM_001385290.1		c.2198C>T	p.Pro733Leu	missense	Exon 15 of 21	NP_001372219.1	A0A8I5QKP7

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KIT	ENST00000288135.6	TSL:1 MANE Select	c.2198C>T	p.Pro733Leu	missense	Exon 15 of 21	ENSP00000288135.6	P10721-1
	KIT	ENST00000412167.7	TSL:1	c.2186C>T	p.Pro729Leu	missense	Exon 15 of 21	ENSP00000390987.3	A0A8J8Z860
	KIT	ENST00000687109.1		c.2201C>T	p.Pro734Leu	missense	Exon 15 of 21	ENSP00000509371.1	A0A8I5KS03

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000797 AC: 2 AN: 250920 AF XY: 0.00000738

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000290

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000882

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000958 AC: 14 AN: 1461100 Hom.: 0 Cov.: 31 AF XY: 0.00000963 AC XY: 7 AN XY: 726884

African (AFR) AF: 0.00 AC: 0 AN: 33438

American (AMR) AF: 0.0000224 AC: 1 AN: 44698

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26110

East Asian (EAS) AF: 0.00 AC: 0 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86238

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53406

Middle Eastern (MID) AF: 0.000173 AC: 1 AN: 5766

European-Non Finnish (NFE) AF: 0.00000990 AC: 11 AN: 1111392

Other (OTH) AF: 0.0000166 AC: 1 AN: 60358

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000676 Hom.: 0

Bravo AF: 0.0000189

EpiCase AF: 0.000109

EpiControl AF: 0.00

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	2	-	Gastrointestinal stromal tumor (2)
-	2	-	not provided (2)
-	1	-	Hereditary cancer-predisposing syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.31
BayesDel_addAF	Uncertain	0.069	T
BayesDel_noAF	Uncertain	-0.060
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.76	D
Eigen	Uncertain	0.49
Eigen_PC	Uncertain	0.47
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Uncertain	0.97	D
M_CAP	Uncertain	0.090	D
MetaRNN	Uncertain	0.54	D
MetaSVM	Uncertain	-0.19	T
MutationAssessor	Benign	1.0	L
PhyloP100		4.0
PrimateAI	Uncertain	0.68	T
PROVEAN	Uncertain	-3.3	D
REVEL	Uncertain	0.36
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.0070	D
Polyphen		0.99	D
Vest4		0.53
MutPred		0.29		Loss of disorder (P = 0.0137)
MVP		0.79
MPC		1.3
ClinPred		0.91	D
GERP RS		5.6
Varity_R		0.38
gMVP		0.80
Mutation Taster		=88/12	polymorphism

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

Other links and lift over

dbSNP: rs992027457; hg19: chr4-55597550;