4-78372804-G-T

Variant names:

• chr4-78372804-G-T
• rs111554790
• NM_025074.7:c.2956G>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_025074.7(FRAS1):​c.2956G>T​(p.Ala986Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,460,794 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/21 in silico tools predict 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. A986T) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: FRAS1 NM_025074.7 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.24
• Publications: 0 publications found

Genes affected

FRAS1 (HGNC:19185): (Fraser extracellular matrix complex subunit 1) This gene encodes an extracellular matrix protein that appears to function in the regulation of epidermal-basement membrane adhesion and organogenesis during development. Mutations in this gene cause Fraser syndrome, a multisystem malformation that can include craniofacial, urogenital and respiratory system abnormalities. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Oct 2009]

FRAS1 Gene-Disease associations (from GenCC):

• Fraser syndrome

  Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• Fraser syndrome 1

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• renal agenesis, unilateral

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.1446738).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_025074.7. 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
	FRAS1	NM_025074.7	MANE Select	c.2956G>T	p.Ala986Ser	missense	Exon 24 of 74	NP_079350.5
	FRAS1	NM_001166133.2		c.2956G>T	p.Ala986Ser	missense	Exon 24 of 42	NP_001159605.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FRAS1	ENST00000512123.4	TSL:5 MANE Select	c.2956G>T	p.Ala986Ser	missense	Exon 24 of 74	ENSP00000422834.2
	FRAS1	ENST00000325942.11	TSL:1	c.2956G>T	p.Ala986Ser	missense	Exon 24 of 42	ENSP00000326330.6
	FRAS1	ENST00000682513.1		c.2956G>T	p.Ala986Ser	missense	Exon 24 of 64	ENSP00000508201.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1460794 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 726690

African (AFR) AF: 0.00 AC: 0 AN: 33460

American (AMR) AF: 0.00 AC: 0 AN: 44708

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86212

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53400

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5214

European-Non Finnish (NFE) AF: 0.00000270 AC: 3 AN: 1111676

Other (OTH) AF: 0.00 AC: 0 AN: 60292

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.080
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.50
CADD	Benign	8.0
DANN	Benign	0.94
Eigen	Benign	-0.92
Eigen_PC	Benign	-0.86
FATHMM_MKL	Benign	0.64	D
LIST_S2	Benign	0.71	T
M_CAP	Benign	0.021	T
MetaRNN	Benign	0.14	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-0.91	N
PhyloP100		1.2
PrimateAI	Benign	0.24	T
PROVEAN	Benign	-1.4	N
REVEL	Benign	0.055
Sift	Benign	0.37	T
Sift4G	Benign	0.18	T
Vest4		0.17
MutPred		0.43		Gain of disorder (P = 0.012)
MVP		0.29
ClinPred		0.16	T
GERP RS		2.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
gMVP		0.16
Mutation Taster		=68/32	polymorphism

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

Other links and lift over

dbSNP: rs111554790; hg19: chr4-79293958;