C1QTNF9 p.Gly77Ala

Variant names:

• chr13-24318881-G-C
• rs748534982
• NM_178540.5:c.229+1G>C

Your query was ambiguous. Multiple possible variants found:

• chr13-24318881-G-C
• chr13-24318881-GA-CT
• chr13-24318881-GA-CC
• chr13-24318881-GA-CG

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PVS1_Moderate PM2

The NM_178540.5(C1QTNF9):​c.229+1G>C variant causes a splice donor, intron change. The variant was absent in control chromosomes in GnomAD project. 3/3 splice prediction tools predicting alterations to normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 33)
• Consequence: C1QTNF9 NM_178540.5 splice_donor, intron
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.27
• Publications: 0 publications found

Genes affected

C1QTNF9 (HGNC:28732): (C1q and TNF related 9) Enables identical protein binding activity. Predicted to be involved in signal transduction. Predicted to be located in extracellular region. Predicted to be part of collagen trimer. [provided by Alliance of Genome Resources, Apr 2022]

ENSG00000273167 (HGNC:):

C1QTNF9-AS1 (HGNC:39906): (C1QTNF9 antisense RNA 1)

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PVS1: Splicing +-2 bp (donor or acceptor) variant, product NOT destroyed by NMD, known LOF gene, truncates exone, which is 0.06287425 fraction of the gene. No cryptic splice site detected. Exon removal is inframe change.
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_178540.5. 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
	C1QTNF9	NM_178540.5	MANE Select	c.229+1G>C		splice_donor intron	N/A	NP_848635.2	P0C862
	C1QTNF9	NM_001303137.2		c.229+1G>C		splice_donor intron	N/A	NP_001290066.1	P0C862
	C1QTNF9	NM_001303138.2		c.229+1G>C		splice_donor intron	N/A	NP_001290067.1	P0C862

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	C1QTNF9	ENST00000332018.5	TSL:1 MANE Select	c.229+1G>C		splice_donor intron	N/A	ENSP00000333737.4	P0C862
	ENSG00000273167	ENST00000382141.4	TSL:5	n.*225+1G>C		splice_donor intron	N/A	ENSP00000371576.4	A0A0A0MRY4
	C1QTNF9	ENST00000382071.6	TSL:5	c.229+1G>C		splice_donor intron	N/A	ENSP00000371503.2	P0C862

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251472 AF XY: 0.00000736

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000879

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Uncertain	-0.070
CADD	Pathogenic	31
DANN	Uncertain	0.99
Eigen	Pathogenic	0.88
Eigen_PC	Uncertain	0.64
FATHMM_MKL	Pathogenic	0.98	D
PhyloP100		5.3
Mutation Taster		=9/91	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.85
SpliceAI score (max)		0.99		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.99		Position offset: -1

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs748534982;

hg19: chr13-24893019;