17-42423033-G-A

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBP6BS1

The NM_012232.6(CAVIN1):c.65C>T(p.Pro22Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0002 in 1,611,430 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0010 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00012 ( 1 hom. )

Consequence

CAVIN1
NM_012232.6 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:2

Conservation

PhyloP100: 2.91

Publications

2 publications found

Variant links:

Genes affected

CAVIN1 (HGNC:9688): (caveolae associated protein 1) This gene encodes a protein that enables the dissociation of paused ternary polymerase I transcription complexes from the 3' end of pre-rRNA transcripts. This protein regulates rRNA transcription by promoting the dissociation of transcription complexes and the reinitiation of polymerase I on nascent rRNA transcripts. This protein also localizes to caveolae at the plasma membrane and is thought to play a critical role in the formation of caveolae and the stabilization of caveolins. This protein translocates from caveolae to the cytoplasm after insulin stimulation. Caveolae contain truncated forms of this protein and may be the site of phosphorylation-dependent proteolysis. This protein is also thought to modify lipid metabolism and insulin-regulated gene expression. Mutations in this gene result in a disorder characterized by generalized lipodystrophy and muscular dystrophy. [provided by RefSeq, Nov 2009]

CAVIN1 Gene-Disease associations (from GenCC):

congenital generalized lipodystrophy type 4
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
Berardinelli-Seip congenital lipodystrophy
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

CAVIN1 links:

ENSG00000294400 (HGNC:):

ENSG00000294400 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.005233854).

BP6

Variant 17-42423033-G-A is Benign according to our data. Variant chr17-42423033-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 549548.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00101 (154/152270) while in subpopulation AFR AF = 0.00306 (127/41540). AF 95% confidence interval is 0.00263. There are 0 homozygotes in GnomAd4. There are 72 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_012232.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CAVIN1	NM_012232.6	MANE Select	c.65C>T	p.Pro22Leu	missense	Exon 1 of 2	NP_036364.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CAVIN1	ENST00000357037.6	TSL:1 MANE Select	c.65C>T	p.Pro22Leu	missense	Exon 1 of 2	ENSP00000349541.4
	ENSG00000294400	ENST00000723360.1		n.466G>A		non_coding_transcript_exon	Exon 1 of 4

Frequencies

GnomAD3 genomes

AF:

0.000986

AC:

150

AN:

152152

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00299

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00124

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00287

GnomAD2 exomes

AF:

0.000217

AC:

AN:

239818

AF XY:

0.000167

show subpopulations

Gnomad AFR exome

AF:

0.00277

Gnomad AMR exome

AF:

0.000205

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000188

Gnomad OTH exome

AF:

0.000169

GnomAD4 exome

AF:

0.000115

AC:

168

AN:

1459160

Hom.:

Cov.:

AF XY:

0.000103

AC XY:

AN XY:

725840

show subpopulations

African (AFR)

AF:

0.00263

AC:

AN:

33428

American (AMR)

AF:

0.000495

AC:

AN:

44476

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26056

East Asian (EAS)

AF:

0.00

AC:

AN:

39638

South Asian (SAS)

AF:

0.000105

AC:

AN:

86074

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52270

Middle Eastern (MID)

AF:

0.000352

AC:

AN:

5678

European-Non Finnish (NFE)

AF:

0.00000630

AC:

AN:

1111260

Other (OTH)

AF:

0.000664

AC:

AN:

60280

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.498

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00101

AC:

154

AN:

152270

Hom.:

Cov.:

AF XY:

0.000967

AC XY:

AN XY:

74466

show subpopulations

African (AFR)

AF:

0.00306

AC:

127

AN:

41540

American (AMR)

AF:

0.00124

AC:

AN:

15298

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5172

South Asian (SAS)

AF:

0.000207

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68014

Other (OTH)

AF:

0.00284

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.492

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000702

Hom.:

Bravo

AF:

0.00126

ESP6500AA

AF:

0.00261

AC:

ESP6500EA

AF:

0.000121

AC:

ExAC

AF:

0.000307

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Sep 29, 2023

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.65C>T (p.P22L) alteration is located in exon 1 (coding exon 1) of the PTRF gene. This alteration results from a C to T substitution at nucleotide position 65, causing the proline (P) at amino acid position 22 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear.

Monogenic diabetes

Uncertain:1

Feb 17, 2017

Personalized Diabetes Medicine Program, University of Maryland School of Medicine

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:research

ACMG Criteria:BP4 (9 predictors)

Congenital generalized lipodystrophy type 4

Uncertain:1

Feb 19, 2020

Revvity Omics, Revvity

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

not provided

Benign:1

Dec 31, 2019

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

CAVIN1-related disorder

Benign:1

Oct 27, 2020

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications).

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.087

BayesDel_addAF

Benign

-0.51

BayesDel_noAF

Benign

-0.51

CADD

Benign

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.11

Eigen

Benign

-0.79

Eigen_PC

Benign

-0.78

FATHMM_MKL

Benign

0.52

LIST_S2

Benign

0.60

M_CAP

Benign

0.037

MetaRNN

Benign

0.0052

MetaSVM

Benign

-1.0

PhyloP100

2.9

PrimateAI

Benign

0.43

PROVEAN

Benign

-1.1

REVEL

Benign

0.11

Sift

Uncertain

0.0060

Sift4G

Benign

0.16

Polyphen

0.0

Vest4

0.068

MVP

0.64

ClinPred

0.090

GERP RS

1.0

PromoterAI

0.023

Neutral

(source)

Varity_R

0.036

gMVP

0.30

Mutation Taster

=88/12

polymorphism

(source)

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over