NM_006995.5:c.427C>T

Variant names:

• chr6-26385347-C-T
• rs769740966
• NM_006995.5:c.427C>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_006995.5(BTN2A2):​c.427C>T​(p.Arg143Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000465 in 1,612,680 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000053 (0 hom., cov: 31)
  • Exomes 𝑓: 0.000046 (1 hom.)
• Consequence: BTN2A2 NM_006995.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.222
• Publications: 1 publications found

Genes affected

BTN2A2 (HGNC:1137): (butyrophilin subfamily 2 member A2) Butyrophilin is the major protein associated with fat droplets in the milk. This gene is a member of the BTN2 subfamily of genes, which encode proteins belonging to the butyrophilin protein family. The gene is located in a cluster on chromosome 6, consisting of seven genes belonging to the expanding B7/butyrophilin-like group, a subset of the immunoglobulin gene superfamily. The encoded protein is a type I receptor glycoprotein involved in lipid, fatty-acid and sterol metabolism. Several alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2010]

ENSG00000291336 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.19910046).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006995.5. 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
	BTN2A2	NM_006995.5	MANE Select	c.427C>T	p.Arg143Cys	missense	Exon 3 of 8	NP_008926.2
	BTN2A2	NM_001197237.2		c.427C>T	p.Arg143Cys	missense	Exon 3 of 8	NP_001184166.1	Q8WVV5-1
	BTN2A2	NM_001197238.2		c.427C>T	p.Arg143Cys	missense	Exon 3 of 8	NP_001184167.1	Q8WVV5-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BTN2A2	ENST00000356709.9	TSL:1 MANE Select	c.427C>T	p.Arg143Cys	missense	Exon 3 of 8	ENSP00000349143.4	Q8WVV5-1
	BTN2A2	ENST00000416795.6	TSL:1	c.427C>T	p.Arg143Cys	missense	Exon 3 of 8	ENSP00000399308.2	Q8WVV5-1
	BTN2A2	ENST00000469230.5	TSL:1	c.427C>T	p.Arg143Cys	missense	Exon 3 of 8	ENSP00000417472.1	Q8WVV5-2

Frequencies

GnomAD3 genomes AF: 0.0000526 AC: 8 AN: 152178 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000196

Gnomad ASJ AF: 0.000288

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.000479

GnomAD2 exomes AF: 0.0000519 AC: 13 AN: 250476 AF XY: 0.0000517

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000579

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000442

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.0000459 AC: 67 AN: 1460502 Hom.: 1 Cov.: 31 AF XY: 0.0000496 AC XY: 36 AN XY: 726288

African (AFR) AF: 0.00 AC: 0 AN: 33460

American (AMR) AF: 0.0000671 AC: 3 AN: 44698

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26068

East Asian (EAS) AF: 0.00 AC: 0 AN: 39664

South Asian (SAS) AF: 0.000104 AC: 9 AN: 86242

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53378

Middle Eastern (MID) AF: 0.000173 AC: 1 AN: 5764

European-Non Finnish (NFE) AF: 0.0000486 AC: 54 AN: 1110884

Other (OTH) AF: 0.00 AC: 0 AN: 60344

GnomAD4 genome AF: 0.0000526 AC: 8 AN: 152178 Hom.: 0 Cov.: 31 AF XY: 0.0000404 AC XY: 3 AN XY: 74334

African (AFR) AF: 0.00 AC: 0 AN: 41440

American (AMR) AF: 0.000196 AC: 3 AN: 15282

Ashkenazi Jewish (ASJ) AF: 0.000288 AC: 1 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5192

South Asian (SAS) AF: 0.00 AC: 0 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10612

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

European-Non Finnish (NFE) AF: 0.0000441 AC: 3 AN: 68034

Other (OTH) AF: 0.000479 AC: 1 AN: 2088

Alfa AF: 0.0000451 Hom.: 0

Bravo AF: 0.0000718

ExAC AF: 0.0000494 AC: 6

EpiCase AF: 0.000109

EpiControl AF: 0.0000593

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

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

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.092
BayesDel_addAF	Benign	-0.33	T
BayesDel_noAF	Benign	-0.45
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Benign	0.093	T
Eigen	Benign	-0.47
Eigen_PC	Benign	-0.69
FATHMM_MKL	Benign	0.060	N
LIST_S2	Benign	0.12	T
M_CAP	Benign	0.0031	T
MetaRNN	Benign	0.20	T
MetaSVM	Benign	-0.96	T
MutationAssessor	Benign	2.0	M
PhyloP100		0.22
PrimateAI	Benign	0.27	T
PROVEAN	Uncertain	-4.0	D
REVEL	Benign	0.11
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.028	D
Polyphen		1.0	D
Vest4		0.25
MVP		0.37
MPC		0.21
ClinPred		0.41	T
GERP RS		0.064
Varity_R		0.13
gMVP		0.24
Mutation Taster		=94/6	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.11		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: rs769740966; hg19: chr6-26385575; COSMIC: COSV61858340; COSMIC: COSV61858340;