NM_003784.4:c.288C>G

Variant names:

• chr18-63793229-C-G
• rs199928267
• NM_003784.4:c.288C>G

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The NM_003784.4(SERPINB7):​c.288C>G​(p.Leu96Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000186 in 1,609,394 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: SERPINB7 NM_003784.4 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.543
• Publications: 0 publications found

Genes affected

SERPINB7 (HGNC:13902): (serpin family B member 7) This gene encodes a member of a family of proteins which function as protease inhibitors. Expression of this gene is upregulated in IgA nephropathy and mutations have been found to cause palmoplantar keratoderma, Nagashima type. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jun 2014]

SERPINB7 Gene-Disease associations (from GenCC):

• palmoplantar keratoderma, Nagashima type

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, PanelApp Australia, Labcorp Genetics (formerly Invitae), G2P, Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.51).
• BP6: Variant 18-63793229-C-G is Benign according to our data. Variant chr18-63793229-C-G is described in ClinVar as Likely_benign. ClinVar VariationId is 3697055.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=0.543 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003784.4. 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
	SERPINB7	NM_003784.4	MANE Select	c.288C>G	p.Leu96Leu	synonymous	Exon 4 of 8	NP_003775.1	O75635-1
	SERPINB7	NM_001040147.3		c.288C>G	p.Leu96Leu	synonymous	Exon 4 of 8	NP_001035237.1	O75635-1
	SERPINB7	NM_001261830.2		c.288C>G	p.Leu96Leu	synonymous	Exon 4 of 8	NP_001248759.1	O75635-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SERPINB7	ENST00000398019.7	TSL:1 MANE Select	c.288C>G	p.Leu96Leu	synonymous	Exon 4 of 8	ENSP00000381101.2	O75635-1
	SERPINB7	ENST00000336429.6	TSL:1	c.288C>G	p.Leu96Leu	synonymous	Exon 4 of 8	ENSP00000337212.2	O75635-1
	SERPINB7	ENST00000546027.5	TSL:2	c.288C>G	p.Leu96Leu	synonymous	Exon 4 of 8	ENSP00000444861.1	O75635-1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152178 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: 0.000192

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: 0.00000401 AC: 1 AN: 249290 AF XY: 0.00000742

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000548

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1457098 Hom.: 0 Cov.: 28 AF XY: 0.00 AC XY: 0 AN XY: 724924

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

African (AFR) AF: 0.00 AC: 0 AN: 33344

American (AMR) AF: 0.00 AC: 0 AN: 44362

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26012

East Asian (EAS) AF: 0.0000507 AC: 2 AN: 39480

South Asian (SAS) AF: 0.00 AC: 0 AN: 85404

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53298

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5752

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1109300

Other (OTH) AF: 0.00 AC: 0 AN: 60146

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.00000037155), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152296 Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1 AN XY: 74466

African (AFR) AF: 0.00 AC: 0 AN: 41554

American (AMR) AF: 0.00 AC: 0 AN: 15304

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.000193 AC: 1 AN: 5188

South Asian (SAS) AF: 0.00 AC: 0 AN: 4822

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

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 290

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68026

Other (OTH) AF: 0.00 AC: 0 AN: 2116

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000227

ClinVar

ClinVar submissions

Significance: Likely 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
BayesDel_noAF	Benign	-0.51
CADD	Benign	4.7
DANN	Benign	0.67
PhyloP100		0.54

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: rs199928267; hg19: chr18-61460463;