chr17-68543723-T-C
Variant names:
Variant summary
Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PVS1_ModeratePM2PP5_Moderate
The NM_017565.4(FAM20A):c.720-2A>G variant causes a splice acceptor, intron change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (★).
Frequency
Genomes: not found (cov: 32)
Consequence
FAM20A
NM_017565.4 splice_acceptor, intron
NM_017565.4 splice_acceptor, intron
Scores
4
2
Splicing: ADA: 1.000
2
Clinical Significance
Conservation
PhyloP100: 7.61
Publications
2 publications found
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]
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 Gene-Disease associations (from GenCC):
- Acrodysostosis 1 with or without hormone resistanceInheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
- acrodysostosis with multiple hormone resistanceInheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Illumina, Orphanet
- Carney complex, type 1Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
- pigmented nodular adrenocortical disease, primary, 1Inheritance: AD Classification: STRONG, MODERATE Submitted by: Genomics England PanelApp, Ambry Genetics
- acrodysostosisInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
- Carney complexInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
- familial atrial myxomaInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
- primary pigmented nodular adrenocortical diseaseInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
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ACMG classification
Classification was made for transcript
Our verdict: Likely_pathogenic. The variant received 6 ACMG points.
PVS1
Splicing +-2 bp (donor or acceptor) variant, product NOT destroyed by NMD, known LOF gene, truncates exone, which is 0.05719557 fraction of the gene. Cryptic splice site detected, with MaxEntScore 8.4, offset of 4, new splice context is: ccttccttccttccggacAGcag. Cryptic site results in frameshift change. If cryptic site found is not functional and variant results in exon loss, it results in inframe change.
PM2
Very rare variant in population databases, with high coverage;
PP5
Variant 17-68543723-T-C is Pathogenic according to our data. Variant chr17-68543723-T-C is described in ClinVar as Pathogenic. ClinVar VariationId is 139648.Status of the report is criteria_provided_single_submitter, 1 stars.
Variant Effect in Transcripts
ACMG analysis was done for transcript: NM_017565.4. You can select a different transcript below to see updated ACMG assignments.
RefSeq Transcripts
Ensembl Transcripts
| Sel. | Gene | Transcript | Tags | HGVSc | HGVSp | Effect | Exon Rank | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|---|
| FAM20A | TSL:1 MANE Select | c.720-2A>G | splice_acceptor intron | N/A | ENSP00000468308.1 | Q96MK3 | |||
| FAM20A | TSL:1 | n.377-6A>G | splice_region intron | N/A | |||||
| FAM20A | c.720-2A>G | splice_acceptor intron | N/A | ENSP00000552185.1 |
Frequencies
GnomAD3 genomes
GnomAD3 genomes
Cov.:
32
GnomAD4 exome Cov.: 31
GnomAD4 exome
Cov.:
31
GnomAD4 genome
GnomAD4 genome
Cov.:
32
ClinVar
ClinVar submissions
View on ClinVar Significance:Pathogenic
Revision:criteria provided, single submitter
Pathogenic
VUS
Benign
Condition
2
-
-
Amelogenesis imperfecta type 1G (2)
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
DANN
Uncertain
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Uncertain
D
PhyloP100
GERP RS
RBP_binding_hub_radar
RBP_regulation_power_radar
Splicing
Name
Calibrated prediction
Score
Prediction
dbscSNV1_ADA
Pathogenic
dbscSNV1_RF
Pathogenic
SpliceAI score (max)
Details are displayed if max score is > 0.2
DS_AG_spliceai
Position offset: 48
DS_AL_spliceai
Position offset: -2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at
Publications
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