rs3806277

Variant names:

• chr1-64887247-C-T
• rs3806277
• NM_002227.4:c.-77-906G>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.-77-906G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0403 in 152,208 control chromosomes in the GnomAD database, including 400 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 0.040 (400 hom., cov: 33)
• Consequence: JAK1 NM_002227.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.157
• Publications: 2 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: STRONG, MODERATE Submitted by: 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=-0.87).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.268 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
JAK1	NM_002227.4	c.-77-906G>A		intron_variant	Intron 1 of 24	ENST00000342505.5	NP_002218.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
JAK1	ENST00000342505.5	c.-77-906G>A		intron_variant	Intron 1 of 24	5	NM_002227.4	ENSP00000343204.4

Frequencies

GnomAD3 genomes AF: 0.0403 AC: 6127 AN: 152090 Hom.: 397 Cov.: 33

Gnomad AFR AF: 0.0525

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0791

Gnomad ASJ AF: 0.0115

Gnomad EAS AF: 0.281

Gnomad SAS AF: 0.112

Gnomad FIN AF: 0.00821

Gnomad MID AF: 0.0316

Gnomad NFE AF: 0.00778

Gnomad OTH AF: 0.0382

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

GnomAD4 genome AF: 0.0403 AC: 6138 AN: 152208 Hom.: 400 Cov.: 33 AF XY: 0.0430 AC XY: 3201 AN XY: 74432

African (AFR) AF: 0.0525 AC: 2178 AN: 41524

American (AMR) AF: 0.0798 AC: 1220 AN: 15282

Ashkenazi Jewish (ASJ) AF: 0.0115 AC: 40 AN: 3466

East Asian (EAS) AF: 0.280 AC: 1449 AN: 5176

South Asian (SAS) AF: 0.113 AC: 544 AN: 4818

European-Finnish (FIN) AF: 0.00821 AC: 87 AN: 10600

Middle Eastern (MID) AF: 0.0340 AC: 10 AN: 294

European-Non Finnish (NFE) AF: 0.00776 AC: 528 AN: 68020

Other (OTH) AF: 0.0388 AC: 82 AN: 2116

Alfa AF: 0.0213 Hom.: 28

Bravo AF: 0.0477

Asia WGS AF: 0.189 AC: 656 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.87
CADD	Benign	6.9
DANN	Benign	0.36
PhyloP100		-0.16
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: rs3806277; hg19: chr1-65352930;