1-64880504-C-T

Variant names:

• chr1-64880504-C-T
• rs2780831
• NM_002227.4:c.206-1356G>A

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_002227.4(JAK1):​c.206-1356G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.342 in 152,020 control chromosomes in the GnomAD database, including 9,442 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.34 (9442 hom., cov: 32)
• Consequence: JAK1 NM_002227.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.22
• Publications: 5 publications found

Genes affected

JAK1 (HGNC:6190): (Janus kinase 1) This gene encodes a membrane protein that is a member of a class of protein-tyrosine kinases (PTK) characterized by the presence of a second phosphotransferase-related domain immediately N-terminal to the PTK domain. The encoded kinase phosphorylates STAT proteins (signal transducers and activators of transcription) and plays a key role in interferon-alpha/beta, interferon-gamma, and cytokine signal transduction. This gene plays a crucial role in effecting the expression of genes that mediate inflammation, epithelial remodeling, and metastatic cancer progression. This gene is a key component of the interleukin-6 (IL-6)/JAK1/STAT3 immune and inflammation response and is a therapeutic target for alleviating cytokine storms. The kinase activity of this gene is directly inhibited by the suppressor of cytokine signalling 1 (SOCS1) protein. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2020]

JAK1 Gene-Disease associations (from GenCC):

• autoinflammation, immune dysregulation, and eosinophilia

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: ClinGen, Ambry Genetics, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.94).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.448 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002227.4. 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
	JAK1	NM_002227.4	MANE Select	c.206-1356G>A		intron	N/A	NP_002218.2	P23458
	JAK1	NM_001320923.2		c.206-1356G>A		intron	N/A	NP_001307852.1	P23458
	JAK1	NM_001321852.2		c.206-1356G>A		intron	N/A	NP_001308781.1	P23458

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	JAK1	ENST00000342505.5	TSL:5 MANE Select	c.206-1356G>A		intron	N/A	ENSP00000343204.4	P23458
	JAK1	ENST00000671929.2		c.206-1356G>A		intron	N/A	ENSP00000500485.1	P23458
	JAK1	ENST00000671954.2		c.206-1356G>A		intron	N/A	ENSP00000500841.1	P23458

Frequencies

GnomAD3 genomes AF: 0.342 AC: 51892 AN: 151906 Hom.: 9403 Cov.: 32

Gnomad AFR AF: 0.453

Gnomad AMI AF: 0.188

Gnomad AMR AF: 0.418

Gnomad ASJ AF: 0.328

Gnomad EAS AF: 0.306

Gnomad SAS AF: 0.261

Gnomad FIN AF: 0.296

Gnomad MID AF: 0.250

Gnomad NFE AF: 0.276

Gnomad OTH AF: 0.330

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.342 AC: 51992 AN: 152020 Hom.: 9442 Cov.: 32 AF XY: 0.343 AC XY: 25479 AN XY: 74342

African (AFR) AF: 0.453 AC: 18768 AN: 41428

American (AMR) AF: 0.419 AC: 6398 AN: 15278

Ashkenazi Jewish (ASJ) AF: 0.328 AC: 1136 AN: 3468

East Asian (EAS) AF: 0.305 AC: 1575 AN: 5166

South Asian (SAS) AF: 0.262 AC: 1263 AN: 4824

European-Finnish (FIN) AF: 0.296 AC: 3122 AN: 10552

Middle Eastern (MID) AF: 0.235 AC: 69 AN: 294

European-Non Finnish (NFE) AF: 0.276 AC: 18779 AN: 67986

Other (OTH) AF: 0.337 AC: 711 AN: 2112

Alfa AF: 0.338 Hom.: 1182

Bravo AF: 0.357

Asia WGS AF: 0.316 AC: 1098 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.94
CADD	Benign	0.27
DANN	Benign	0.28
PhyloP100		-1.2
Mutation Taster		=100/0	polymorphism (auto)

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: rs2780831; hg19: chr1-65346187;