Genetic Variant FRRS1L:p.Pro42Pro (chr9-109167013-G-T) – ACMG Classification: Benign (-13 pts)

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_StrongBP6_Very_StrongBP7

The NM_014334.4(FRRS1L):c.126C>A(p.Pro42Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000138 in 1,230,162 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.000040 ( 0 hom., cov: 25)

Exomes 𝑓: 0.000010 ( 0 hom. )

Consequence

FRRS1L
NM_014334.4 synonymous

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: 0.173

Publications

0 publications found

Variant links:

Genes affected

FRRS1L (HGNC:1362): (ferric chelate reductase 1 like) This gene encodes a component of the outer-core of an alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor protein in the brain. The encoded protein is thought to interact with inner-core components of the receptor, and play a role in the modulation of glutamate signaling. Mutations in this gene are associated with early infantile epileptic encephalopathy 37. [provided by RefSeq, Jul 2016]

FRRS1L Gene-Disease associations (from GenCC):

developmental and epileptic encephalopathy, 37
Inheritance: AR Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
autosomal recessive non-syndromic intellectual disability
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

FRRS1L links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -13 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.86).

BP6

Variant 9-109167013-G-T is Benign according to our data. Variant chr9-109167013-G-T is described in ClinVar as Likely_benign. ClinVar VariationId is 476300.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=0.173 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_014334.4. 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
	FRRS1L	NM_014334.4	MANE Select	c.126C>A	p.Pro42Pro	synonymous	Exon 1 of 5	NP_055149.3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
FRRS1L	ENST00000561981.5	TSL:1 MANE Select	c.126C>A	p.Pro42Pro	synonymous	Exon 1 of 5	ENSP00000477141.2
FRRS1L	ENST00000642299.1		n.-82C>A		upstream_gene	N/A	ENSP00000495137.1
FRRS1L	ENST00000644747.1		n.-10C>A		upstream_gene	N/A	ENSP00000493964.1

Frequencies

GnomAD3 genomes

AF:

0.0000402

AC:

AN:

149322

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000332

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:

0.00

Gnomad OTH

AF:

0.000488

GnomAD2 exomes

AF:

0.00129

AC:

AN:

3882

AF XY:

0.00129

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00809

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000102

AC:

AN:

1080840

Hom.:

Cov.:

AF XY:

0.0000136

AC XY:

AN XY:

515222

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

22288

American (AMR)

AF:

0.00128

AC:

AN:

8594

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

13678

East Asian (EAS)

AF:

0.00

AC:

AN:

25318

South Asian (SAS)

AF:

0.00

AC:

AN:

22804

European-Finnish (FIN)

AF:

0.00

AC:

AN:

22502

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2866

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

920020

Other (OTH)

AF:

0.00

AC:

AN:

42770

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.566

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

AF:

0.0000402

AC:

AN:

149322

Hom.:

Cov.:

AF XY:

0.0000412

AC XY:

AN XY:

72788

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

40932

American (AMR)

AF:

0.000332

AC:

AN:

15044

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3440

East Asian (EAS)

AF:

0.00

AC:

AN:

5008

South Asian (SAS)

AF:

0.00

AC:

AN:

4788

European-Finnish (FIN)

AF:

0.00

AC:

AN:

9946

Middle Eastern (MID)

AF:

0.00

AC:

AN:

312

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

66890

Other (OTH)

AF:

0.000488

AC:

AN:

2050

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

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:

0.0000712

Hom.:

Bravo

AF:

0.000178

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:1

Mar 18, 2021

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Developmental and epileptic encephalopathy, 37

Benign:1

Jan 30, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.86

CADD

Benign

(source)

DANN

Benign

0.96

PhyloP100

0.17

PromoterAI

-0.044

Neutral

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

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