chr5-40928582-G-A

Variant names:

• chr5-40928582-G-A
• rs769797850
• NM_000587.4:c.9G>A

Variant summary

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

The NM_000587.4(C7):​c.9G>A​(p.Val3Val) variant causes a splice region, synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: C7 NM_000587.4 splice_region, synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.491
• Publications: 0 publications found

Genes affected

C7 (HGNC:1346): (complement C7) This gene encodes a serum glycoprotein that forms a membrane attack complex together with complement components C5b, C6, C8, and C9 as part of the terminal complement pathway of the innate immune system. The protein encoded by this gene contains a cholesterol-dependent cytolysin/membrane attack complex/perforin-like (CDC/MACPF) domain and belongs to a large family of structurally related molecules that form pores involved in host immunity and bacterial pathogenesis. This protein initiates membrane attack complex formation by binding the C5b-C6 subcomplex and inserts into the phospholipid bilayer, serving as a membrane anchor. Mutations in this gene are associated with a rare disorder called C7 deficiency. [provided by RefSeq, Nov 2016]

C7 Gene-Disease associations (from GenCC):

• complement component 7 deficiency

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Illumina, Ambry Genetics

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=-0.88).
• BP6: Variant 5-40928582-G-A is Benign according to our data. Variant chr5-40928582-G-A is described in ClinVar as Likely_benign. ClinVar VariationId is 2776014.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-0.491 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000587.4. 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
	C7	NM_000587.4	MANE Select	c.9G>A	p.Val3Val	splice_region synonymous	Exon 2 of 18	NP_000578.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	C7	ENST00000313164.10	TSL:1 MANE Select	c.9G>A	p.Val3Val	splice_region synonymous	Exon 2 of 18	ENSP00000322061.9	P10643
	C7	ENST00000908410.1		c.9G>A	p.Val3Val	splice_region synonymous	Exon 2 of 19	ENSP00000578469.1
	C7	ENST00000908412.1		c.9G>A	p.Val3Val	splice_region synonymous	Exon 2 of 19	ENSP00000578471.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1369978 Hom.: 0 Cov.: 25 AF XY: 0.00 AC XY: 0 AN XY: 677818

African (AFR) AF: 0.00 AC: 0 AN: 31046

American (AMR) AF: 0.00 AC: 0 AN: 35218

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25012

East Asian (EAS) AF: 0.00 AC: 0 AN: 36194

South Asian (SAS) AF: 0.00 AC: 0 AN: 75748

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49838

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5624

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1054210

Other (OTH) AF: 0.00 AC: 0 AN: 57088

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

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	-0.88
CADD	Benign	0.61
DANN	Benign	0.73
PhyloP100		-0.49

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: rs769797850; hg19: chr5-40928684;