NM_001102416.3:c.421G>A

Variant names:

• chr3-186725117-G-A
• rs1579116763
• NM_001102416.3:c.421G>A

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Moderate BP6_Moderate

The NM_001102416.3(KNG1):​c.421G>A​(p.Asp141Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,461,816 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: KNG1 NM_001102416.3 missense
• Clinical Significance: Likely benign criteria provided, single submitter B:1 O:1
• Conservation: PhyloP100: -0.240
• Publications: 0 publications found

Genes affected

KNG1 (HGNC:6383): (kininogen 1) This gene uses alternative splicing to generate two different proteins- high molecular weight kininogen (HMWK) and low molecular weight kininogen (LMWK). HMWK is essential for blood coagulation and assembly of the kallikrein-kinin system. Also, bradykinin, a peptide causing numerous physiological effects, is released from HMWK. Bradykinin also functions as an antimicrobial peptide with antibacterial and antifungal activity. In contrast to HMWK, LMWK is not involved in blood coagulation. Infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) reduces or depletes angiotensin converting enzyme 2 (ACE2), which results in an increase in levels of des-Arg(9)-bradykinin, a bioactive metabolite of bradykinin that is associated with lung injury and inflammation. Three transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2020]

HRG-AS1 (HGNC:55915): (HRG and FETUB antisense RNA 1)

ACMG classification

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

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.10881111).
• BP6: Variant 3-186725117-G-A is Benign according to our data. Variant chr3-186725117-G-A is described in ClinVar as Likely_benign. ClinVar VariationId is 827590.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001102416.3. 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
	KNG1	NM_001102416.3	MANE Select	c.421G>A	p.Asp141Asn	missense	Exon 4 of 10	NP_001095886.1	P01042-1
	KNG1	NM_000893.4		c.421G>A	p.Asp141Asn	missense	Exon 4 of 11	NP_000884.1	P01042-2
	KNG1	NM_001166451.2		c.421G>A	p.Asp141Asn	missense	Exon 4 of 10	NP_001159923.1	P01042-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KNG1	ENST00000644859.2	MANE Select	c.421G>A	p.Asp141Asn	missense	Exon 4 of 10	ENSP00000493985.1	P01042-1
	KNG1	ENST00000287611.8	TSL:1	c.421G>A	p.Asp141Asn	missense	Exon 4 of 11	ENSP00000287611.2	P01042-2
	KNG1	ENST00000897809.1		c.451G>A	p.Asp151Asn	missense	Exon 4 of 10	ENSP00000567868.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461816 Hom.: 0 Cov.: 34 AF XY: 0.00000413 AC XY: 3 AN XY: 727202

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39696

South Asian (SAS) AF: 0.00 AC: 0 AN: 86248

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53380

Middle Eastern (MID) AF: 0.000173 AC: 1 AN: 5768

European-Non Finnish (NFE) AF: 0.00000360 AC: 4 AN: 1111998

Other (OTH) AF: 0.00 AC: 0 AN: 60392

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	not specified (1)
-	-	-	Hereditary angioedema with normal C1Inh (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.082
BayesDel_addAF	Benign	-0.41	T
BayesDel_noAF	Benign	-0.83
CADD	Benign	0.20
DANN	Benign	0.82
DEOGEN2	Benign	0.27	T
Eigen	Benign	-1.9
Eigen_PC	Benign	-2.0
FATHMM_MKL	Benign	0.010	N
LIST_S2	Benign	0.16	T
M_CAP	Benign	0.0027	T
MetaRNN	Benign	0.11	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.1	L
PhyloP100		-0.24
PrimateAI	Benign	0.23	T
PROVEAN	Benign	-0.54	N
REVEL	Benign	0.030
Sift	Benign	0.51	T
Sift4G	Benign	0.53	T
Polyphen		0.0010	B
Vest4		0.058
MutPred		0.51		Loss of glycosylation at T137 (P = 0.0538)
MVP		0.34
MPC		0.061
ClinPred		0.082	T
GERP RS		-8.1
Varity_R		0.027
gMVP		0.31
Mutation Taster		=97/3	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: rs1579116763; hg19: chr3-186442906; COSMIC: COSV99405626; COSMIC: COSV99405626;