NM_198568.3:c.-28+194C>T

Variant names:

• chr6-87322672-G-A
• rs7341237
• NM_198568.3:c.-28+194C>T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_198568.3(GJB7):​c.-28+194C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000132 in 151,912 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 0.000013 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: GJB7 NM_198568.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.28

Genes affected

GJB7 (HGNC:16690): (gap junction protein beta 7) Connexins, such as GJB7, are involved in the formation of gap junctions, intercellular conduits that directly connect the cytoplasms of contacting cells. Each gap junction channel is formed by docking of 2 hemichannels, each of which contains 6 connexin subunits (Sohl et al., 2003 [PubMed 12881038]).[supplied by OMIM, Mar 2008]

SMIM8 (HGNC:21401): (small integral membrane protein 8) Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.84).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GJB7	NM_198568.3	c.-28+194C>T		intron_variant	Intron 2 of 2	ENST00000525899.6	NP_940970.1
SMIM8	NM_001042493.3	c.-45+40G>A		intron_variant	Intron 1 of 3	ENST00000392863.6	NP_001035958.1
SMIM8	NM_020425.6	c.-24+40G>A		intron_variant	Intron 1 of 2		NP_065158.3
SMIM8	NM_001287445.2	c.-24+40G>A		intron_variant	Intron 1 of 2		NP_001274374.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GJB7	ENST00000525899.6	c.-28+194C>T		intron_variant	Intron 2 of 2	1	NM_198568.3	ENSP00000435355.1
SMIM8	ENST00000392863.6	c.-45+40G>A		intron_variant	Intron 1 of 3	1	NM_001042493.3	ENSP00000376603.1

Frequencies

GnomAD3 genomes AF: 0.0000132 AC: 2 AN: 151912 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: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000294

Gnomad OTH AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 98 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 68

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0000132 AC: 2 AN: 151912 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74192

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000294

Gnomad4 OTH AF: 0.00

Bravo AF: 0.00000756

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	4.1
DANN	Benign	0.87
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0

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

Publications

LitVar

Other links and lift over

dbSNP: rs7341237; hg19: chr6-88032390;