17-68537592-G-A

Position:

chr17-68537592-G-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_017565.4(FAM20A):c.1511C>T(p.Thr504Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000971 in 1,613,700 control chromosomes in the GnomAD database, including 13 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0051 ( 4 hom., cov: 32)

Exomes 𝑓: 0.00054 ( 9 hom. )

Consequence

FAM20A
NM_017565.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: 1.11

Variant links:

Genes affected

FAM20A (HGNC:23015): (FAM20A golgi associated secretory pathway pseudokinase) This locus encodes a protein that is likely secreted and may function in hematopoiesis. A mutation at this locus has been associated with amelogenesis imperfecta and gingival hyperplasia syndrome. Alternatively spliced transcript variants have been identified. [provided by RefSeq, Aug 2011]

FAM20A links:

PRKAR1A (HGNC:9388): (protein kinase cAMP-dependent type I regulatory subunit alpha) cAMP is a signaling molecule important for a variety of cellular functions. cAMP exerts its effects by activating the cAMP-dependent protein kinase, which transduces the signal through phosphorylation of different target proteins. The inactive kinase holoenzyme is a tetramer composed of two regulatory and two catalytic subunits. cAMP causes the dissociation of the inactive holoenzyme into a dimer of regulatory subunits bound to four cAMP and two free monomeric catalytic subunits. Four different regulatory subunits and three catalytic subunits have been identified in humans. This gene encodes one of the regulatory subunits. This protein was found to be a tissue-specific extinguisher that down-regulates the expression of seven liver genes in hepatoma x fibroblast hybrids. Mutations in this gene cause Carney complex (CNC). This gene can fuse to the RET protooncogene by gene rearrangement and form the thyroid tumor-specific chimeric oncogene known as PTC2. A nonconventional nuclear localization sequence (NLS) has been found for this protein which suggests a role in DNA replication via the protein serving as a nuclear transport protein for the second subunit of the Replication Factor C (RFC40). Several alternatively spliced transcript variants encoding two different isoforms have been observed. [provided by RefSeq, Jan 2013]

PRKAR1A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0023069382).

BP6

Variant 17-68537592-G-A is Benign according to our data. Variant chr17-68537592-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 369223.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00506 (771/152306) while in subpopulation AFR AF= 0.0172 (713/41562). AF 95% confidence interval is 0.0161. There are 4 homozygotes in gnomad4. There are 377 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 4 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FAM20A	NM_017565.4 linkuse as main transcript	c.1511C>T	p.Thr504Ile	missense_variant	11/11	ENST00000592554.2	NP_060035.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FAM20A	ENST00000592554.2 linkuse as main transcript	c.1511C>T	p.Thr504Ile	missense_variant	11/11	1	NM_017565.4	ENSP00000468308	P1

Frequencies

GnomAD3 genomes

AF:

0.00500

AC:

761

AN:

152188

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0170

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00268

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.00478

GnomAD3 exomes

AF:

0.00156

AC:

391

AN:

250598

Hom.:

AF XY:

0.00123

AC XY:

167

AN XY:

135430

show subpopulations

Gnomad AFR exome

AF:

0.0182

Gnomad AMR exome

AF:

0.00191

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000656

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000794

Gnomad OTH exome

AF:

0.00327

GnomAD4 exome

AF:

0.000545

AC:

796

AN:

1461394

Hom.:

Cov.:

AF XY:

0.000455

AC XY:

331

AN XY:

726922

show subpopulations

Gnomad4 AFR exome

AF:

0.0179

Gnomad4 AMR exome

AF:

0.00206

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000696

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000180

Gnomad4 OTH exome

AF:

0.00114

GnomAD4 genome

AF:

0.00506

AC:

771

AN:

152306

Hom.:

Cov.:

AF XY:

0.00506

AC XY:

377

AN XY:

74474

show subpopulations

Gnomad4 AFR

AF:

0.0172

Gnomad4 AMR

AF:

0.00268

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000882

Gnomad4 OTH

AF:

0.00473

Alfa

AF:

0.000847

Hom.:

Bravo

AF:

0.00584

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.0152

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.00191

AC:

232

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.000218

EpiControl

AF:

0.000297

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 15, 2024	- -
Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

not specified

Benign:1

Benign, no assertion criteria provided

clinical testing

Genetic Services Laboratory, University of Chicago

Nov 03, 2022

- -

Acrodysostosis

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Carney complex

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.066

BayesDel_addAF

Benign

-0.58

BayesDel_noAF

Benign

-0.60

CADD

Benign

DANN

Benign

0.76

DEOGEN2

Benign

0.13

.;T

Eigen

Benign

-1.1

Eigen_PC

Benign

-0.94

FATHMM_MKL

Benign

0.10

LIST_S2

Benign

0.54

T;T

MetaRNN

Benign

0.0023

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-0.37

.;N

MutationTaster

Benign

1.0

PrimateAI

Benign

0.26

Sift4G

Benign

0.97

T;T

Polyphen

0.0

.;B

Vest4

0.019

MVP

0.34

MPC

0.17

ClinPred

0.000033

GERP RS

0.80

Varity_R

0.050

gMVP

0.18

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over