19-19539680-C-G

Variant names:

• chr19-19539680-C-G
• rs773143828
• NM_153221.2:c.66C>G

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_153221.2(CILP2):​c.66C>G​(p.Asp22Glu) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000035 in 1,428,750 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 18/24 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000035 (0 hom.)
• Consequence: CILP2 NM_153221.2 missense, splice_region
• Scores: Splicing: ADA: 0.0002967
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.628
• Publications: 0 publications found

Genes affected

CILP2 (HGNC:24213): (cartilage intermediate layer protein 2) Located in extracellular exosome. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.040105104).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_153221.2. 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
	CILP2	NM_153221.2	MANE Select	c.66C>G	p.Asp22Glu	missense splice_region	Exon 2 of 8	NP_694953.2	Q8IUL8

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CILP2	ENST00000291495.5	TSL:1 MANE Select	c.66C>G	p.Asp22Glu	missense splice_region	Exon 2 of 8	ENSP00000291495.3	Q8IUL8
	CILP2	ENST00000586018.5	TSL:2	c.66C>G	p.Asp22Glu	missense splice_region	Exon 2 of 8	ENSP00000467413.1	K7EPJ4
	CILP2	ENST00000862972.1		c.66C>G	p.Asp22Glu	missense splice_region	Exon 2 of 8	ENSP00000533031.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000442 AC: 1 AN: 226124 AF XY: 0.00

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: 0.00000979

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000350 AC: 5 AN: 1428750 Hom.: 0 Cov.: 31 AF XY: 0.00000141 AC XY: 1 AN XY: 710166

African (AFR) AF: 0.00 AC: 0 AN: 31430

American (AMR) AF: 0.00 AC: 0 AN: 41652

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 24942

East Asian (EAS) AF: 0.00 AC: 0 AN: 37130

South Asian (SAS) AF: 0.00 AC: 0 AN: 82698

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52474

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5628

European-Non Finnish (NFE) AF: 0.00000457 AC: 5 AN: 1094018

Other (OTH) AF: 0.00 AC: 0 AN: 58778

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.086
BayesDel_addAF	Benign	-0.34	T
BayesDel_noAF	Benign	-0.73
CADD	Benign	0.92
DANN	Benign	0.84
DEOGEN2	Benign	0.019	T
Eigen	Benign	-1.3
Eigen_PC	Benign	-1.4
FATHMM_MKL	Benign	0.016	N
LIST_S2	Benign	0.30	T
M_CAP	Benign	0.010	T
MetaRNN	Benign	0.040	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.0	N
PhyloP100		-0.63
PrimateAI	Benign	0.42	T
PROVEAN	Benign	-0.30	N
REVEL	Benign	0.016
Sift	Benign	0.71	T
Sift4G	Benign	0.56	T
Polyphen		0.039	B
Vest4		0.065
MutPred		0.20		Gain of solvent accessibility (P = 0.0306)
MVP		0.34
MPC		0.34
ClinPred		0.032	T
GERP RS		-1.4
Varity_R		0.044
gMVP		0.20
Mutation Taster		=99/1	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.00030
dbscSNV1_RF	Benign	0.020
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: rs773143828; hg19: chr19-19650489;