Genetic Variant FAM111B:p.Lys207Arg (chr11-59124717-A-G) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_198947.4(FAM111B):c.620A>G(p.Lys207Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,410 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 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. K207T) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

FAM111B
NM_198947.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.729

Publications

0 publications found

Variant links:

Genes affected

FAM111B (HGNC:24200): (FAM111 trypsin like peptidase B) This gene encodes a protein with a trypsin-like cysteine/serine peptidase domain in the C-terminus. Mutations in this gene are associated with an autosomal dominant form of hereditary fibrosing poikiloderma (HFP). Affected individuals display mottled pigmentation, telangiectasia, epidermal atrophy, tendon contractures, and progressive pulmonary fibrosis. Alternative splicing results in multiple transcript variants encoding distinct isoforms. A paralog of this gene which also has a trypsin‐like peptidase domain, FAM111A, is located only 16 kb from this gene on human chromosome 11q12.1. [provided by RefSeq, Apr 2014]

FAM111B Gene-Disease associations (from GenCC):

hereditary sclerosing poikiloderma with tendon and pulmonary involvement
Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: G2P, Labcorp Genetics (formerly Invitae), ClinGen, Ambry Genetics, Orphanet

FAM111B links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.04812783).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_198947.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
FAM111B	NM_198947.4	MANE Select	c.620A>G	p.Lys207Arg	missense	Exon 4 of 4	NP_945185.1	Q6SJ93-1
FAM111B	NM_001142703.2		c.530A>G	p.Lys177Arg	missense	Exon 3 of 3	NP_001136175.1	Q6SJ93-2
FAM111B	NM_001142704.2		c.530A>G	p.Lys177Arg	missense	Exon 2 of 2	NP_001136176.1	Q6SJ93-2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
FAM111B	ENST00000343597.4	TSL:1 MANE Select	c.620A>G	p.Lys207Arg	missense	Exon 4 of 4	ENSP00000341565.3	Q6SJ93-1
FAM111B	ENST00000529618.5	TSL:1	c.530A>G	p.Lys177Arg	missense	Exon 3 of 3	ENSP00000432875.1	Q6SJ93-2
FAM111B	ENST00000620384.1	TSL:2	c.620A>G	p.Lys207Arg	missense	Exon 2 of 2	ENSP00000483456.1	Q6SJ93-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461410

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726942

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33460

American (AMR)

AF:

0.00

AC:

AN:

44688

Ashkenazi Jewish (ASJ)

AF:

0.0000383

AC:

AN:

26116

East Asian (EAS)

AF:

0.00

AC:

AN:

39674

South Asian (SAS)

AF:

0.00

AC:

AN:

86190

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53406

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111726

Other (OTH)

AF:

0.00

AC:

AN:

60382

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.098

BayesDel_addAF

Benign

-0.30

BayesDel_noAF

Benign

-0.68

CADD

Benign

0.33

(source)

DANN

Benign

0.93

DEOGEN2

Benign

0.019

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.055

LIST_S2

Benign

0.42

M_CAP

Benign

0.0059

MetaRNN

Benign

0.048

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.0

PhyloP100

-0.73

PrimateAI

Benign

0.32

PROVEAN

Benign

-1.5

REVEL

Benign

0.011

Sift

Benign

0.23

Sift4G

Benign

0.50

Polyphen

0.0010

Vest4

0.045

MutPred

0.15

Gain of MoRF binding (P = 0.0657)

MVP

0.29

MPC

0.046

ClinPred

0.035

GERP RS

-1.7

Varity_R

0.028

gMVP

0.066

Mutation Taster

=100/0

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over