1-207678255-A-T

Variant names:

• chr1-207678255-A-T
• rs376438388
• NM_175710.2:c.335A>T

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_175710.2(CR1L):​c.335A>T​(p.Asp112Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,396 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. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D112G) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: CR1L NM_175710.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.00900
• Publications: 0 publications found

Genes affected

CR1L (HGNC:2335): (complement C3b/C4b receptor 1 like) Acts upstream of or within regulation of complement activation and regulation of complement-dependent cytotoxicity. Part of receptor complex. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.33365068).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_175710.2. 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
	CR1L	NM_175710.2	MANE Select	c.335A>T	p.Asp112Val	missense	Exon 3 of 12	NP_783641.1	Q2VPA4-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CR1L	ENST00000508064.7	TSL:1 MANE Select	c.335A>T	p.Asp112Val	missense	Exon 3 of 12	ENSP00000421736.2	Q2VPA4-1
	CR1L	ENST00000294997.10	TSL:1	n.167A>T		non_coding_transcript_exon	Exon 2 of 13	ENSP00000434864.1	A0A0C4DGF5
	CR1L	ENST00000430248.5	TSL:3	n.339A>T		non_coding_transcript_exon	Exon 3 of 3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461396 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 727002

⚠️ 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: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26130

East Asian (EAS) AF: 0.00 AC: 0 AN: 39694

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86246

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53402

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111592

Other (OTH) AF: 0.00 AC: 0 AN: 60364

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.53
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.46
CADD	Benign	14
DANN	Uncertain	0.98
DEOGEN2	Benign	0.021	T
Eigen	Benign	-0.44
Eigen_PC	Benign	-0.76
FATHMM_MKL	Benign	0.012	N
LIST_S2	Uncertain	0.88	D
M_CAP	Benign	0.017	T
MetaRNN	Benign	0.33	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.5	M
PhyloP100		0.0090
PrimateAI	Benign	0.38	T
PROVEAN	Pathogenic	-4.4	D
REVEL	Benign	0.069
Sift	Uncertain	0.018	D
Sift4G	Uncertain	0.014	D
Polyphen		0.98	D
Vest4		0.37
MutPred		0.59		Gain of MoRF binding (P = 0.0282)
MVP		0.15
MPC		0.71
ClinPred		0.86	D
GERP RS		-2.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.23
gMVP		0.44
Mutation Taster		=100/0	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs376438388; hg19: chr1-207851600;