rs267598666

Variant names:

• chr1-56867652-C-T
• rs267598666
• NM_000562.3:c.121C>T

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Moderate BP6_Moderate BP7

The NM_000562.3(C8A):​c.121C>T​(p.Leu41Leu) variant causes a 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. Variant has been reported in ClinVar as Likely benign (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: C8A NM_000562.3 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 1.99
• Publications: 1 publications found

Genes affected

C8A (HGNC:1352): (complement C8 alpha chain) C8 is a component of the complement system and contains three polypeptides, alpha, beta and gamma. This gene encodes the alpha subunit of C8. C8 participates in the formation of the membrane attack complex (MAC). The MAC assembles on bacterial membranes to form a pore, permitting disruption of bacterial membrane organization. Mutations in this gene cause complement C8 alpha-gamma deficiency. [provided by RefSeq, Nov 2008]

C8A Gene-Disease associations (from GenCC):

• type I complement component 8 deficiency

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

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.39).
• BP6: Variant 1-56867652-C-T is Benign according to our data. Variant chr1-56867652-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 2034872.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=1.99 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000562.3. 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
	C8A	NM_000562.3	MANE Select	c.121C>T	p.Leu41Leu	synonymous	Exon 2 of 11	NP_000553.1	P07357

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	C8A	ENST00000361249.4	TSL:1 MANE Select	c.121C>T	p.Leu41Leu	synonymous	Exon 2 of 11	ENSP00000354458.3	P07357
	C8A	ENST00000695678.1		c.121C>T	p.Leu41Leu	synonymous	Exon 2 of 11	ENSP00000512098.1	A0A8Q3WL79
	C8A	ENST00000854265.1		c.121C>T	p.Leu41Leu	synonymous	Exon 2 of 11	ENSP00000524324.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

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	-0.39
CADD	Benign	8.4
DANN	Benign	0.81
PhyloP100		2.0
Mutation Taster		=100/0	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: rs267598666; hg19: chr1-57333325;