9-5126453-ATT-ATTT

Variant names:

• chr9-5126453-A-AT
• rs749188860
• NM_004972.4:c.3291+16dupT

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP6_Moderate

The NM_004972.4(JAK2):​c.3291+16dupT variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000152 in 1,395,708 control chromosomes in the GnomAD database, with no homozygous occurrence. There is a variant allele frequency bias in the population database for this variant (GnomAdExome4), which may indicate mosaicism or somatic mutations in the reference population data. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00015 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: JAK2 NM_004972.4 intron
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.629
• Publications: 0 publications found

Genes affected

JAK2 (HGNC:6192): (Janus kinase 2) This gene encodes a non-receptor tyrosine kinase that plays a central role in cytokine and growth factor signalling. The primary isoform of this protein has an N-terminal FERM domain that is required for erythropoietin receptor association, an SH2 domain that binds STAT transcription factors, a pseudokinase domain and a C-terminal tyrosine kinase domain. Cytokine binding induces autophosphorylation and activation of this kinase. This kinase then recruits and phosphorylates signal transducer and activator of transcription (STAT) proteins. Growth factors like TGF-beta 1 also induce phosphorylation and activation of this kinase and translocation of downstream STAT proteins to the nucleus where they influence gene transcription. Mutations in this gene are associated with numerous inflammatory diseases and malignancies. This gene is a downstream target of the pleiotropic cytokine IL6 that is produced by B cells, T cells, dendritic cells and macrophages to produce an immune response or inflammation. Disregulation of the IL6/JAK2/STAT3 signalling pathways produces increased cellular proliferation and myeloproliferative neoplasms of hematopoietic stem cells. A nonsynonymous mutation in the pseudokinase domain of this gene disrupts the domains inhibitory effect and results in constitutive tyrosine phosphorylation activity and hypersensitivity to cytokine signalling. This gene and the IL6/JAK2/STAT3 signalling pathway is a therapeutic target for the treatment of excessive inflammatory responses to viral infections. Alternative splicing results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Jul 2020]

INSL6 (HGNC:6089): (insulin like 6) The protein encoded by this gene contains a classical signature of the insulin superfamily and is significantly similar to relaxin and relaxin-like factor. This gene is preferentially expressed in testis. Its expression in testis is restricted to interstitial cells surrounding seminiferous tubules, which suggests a role in sperm development and fertilization. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• BP6: Variant 9-5126453-A-AT is Benign according to our data. Variant chr9-5126453-A-AT is described in ClinVar as Benign. ClinVar VariationId is 2972445.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004972.4. 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
	JAK2	NM_004972.4	MANE Select	c.3291+16dupT		intron	N/A	NP_004963.1	O60674
	JAK2	NM_001322194.2		c.3291+16dupT		intron	N/A	NP_001309123.1	O60674
	JAK2	NM_001322195.2		c.3291+16dupT		intron	N/A	NP_001309124.1	O60674

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	JAK2	ENST00000381652.4	TSL:1 MANE Select	c.3291+16dupT		intron	N/A	ENSP00000371067.4	O60674
	JAK2	ENST00000870320.1		c.3291+16dupT		intron	N/A	ENSP00000540379.1
	JAK2	ENST00000870321.1		c.3291+16dupT		intron	N/A	ENSP00000540380.1

Frequencies

GnomAD3 genomes AF: 0.00000662 AC: 1 AN: 150976 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000193

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.000120 AC: 25 AN: 207828 AF XY: 0.000115

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000393

Gnomad ASJ exome AF: 0.000127

Gnomad EAS exome AF: 0.000331

Gnomad FIN exome AF: 0.0000510

Gnomad NFE exome AF: 0.0000512

Gnomad OTH exome AF: 0.000201

GnomAD4 exome AF: 0.000152 AC: 212 AN: 1395708 Hom.: 0 Cov.: 23 AF XY: 0.000126 AC XY: 88 AN XY: 696340

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.0000633 AC: 2 AN: 31574

American (AMR) AF: 0.000217 AC: 9 AN: 41540

Ashkenazi Jewish (ASJ) AF: 0.0000398 AC: 1 AN: 25104

East Asian (EAS) AF: 0.000386 AC: 15 AN: 38848

South Asian (SAS) AF: 0.000110 AC: 9 AN: 81514

European-Finnish (FIN) AF: 0.0000379 AC: 2 AN: 52766

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5596

European-Non Finnish (NFE) AF: 0.000157 AC: 167 AN: 1060748

Other (OTH) AF: 0.000121 AC: 7 AN: 58018

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Data not reliable, filtered out with message: AS_VQSR AF: 0.00000662 AC: 1 AN: 150976 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 73732

African (AFR) AF: 0.00 AC: 0 AN: 41268

American (AMR) AF: 0.00 AC: 0 AN: 15126

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3452

East Asian (EAS) AF: 0.000193 AC: 1 AN: 5168

South Asian (SAS) AF: 0.00 AC: 0 AN: 4804

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10494

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 67352

Other (OTH) AF: 0.00 AC: 0 AN: 2084

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000264

ClinVar

ClinVar submissions

Significance: Benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		0.63
Mutation Taster		=100/0	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: rs749188860; hg19: chr9-5126453;