Genetic Variant MYO7B:p.Ile185Thr (chr2-127569872-T-C) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_001393586.1(MYO7B):c.554T>C(p.Ile185Thr) variant causes a missense change. The variant allele was found at a frequency of 0.00000558 in 1,613,058 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000055 ( 0 hom. )

Consequence

MYO7B
NM_001393586.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.16

Variant links:

Genes affected

MYO7B (HGNC:7607): (myosin VIIB) The protein encoded by this gene is found in brush border microvilli of epithelial cells in the intestines and kidneys. The encoded protein is involved in linking protocadherins to the actin cytoskeleton and is essential for proper microvilli function. This protein aids in the accumulation of intermicrovillar adhesion components such as harmonin and ANKS4B, and this accumulation is necessary for normal brush border action. [provided by RefSeq, Jan 2017]

MYO7B links:

LOC105373609 (HGNC:):

LOC105373609 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.897

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYO7B	NM_001393586.1 link	c.554T>C	p.Ile185Thr	missense_variant	Exon 6 of 48	ENST00000409816.8	NP_001380515.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MYO7B	ENST00000409816.8 link	c.554T>C	p.Ile185Thr	missense_variant	Exon 6 of 48	1	NM_001393586.1	ENSP00000386461.3		A0A8C8KL71
MYO7B	ENST00000428314.5 link	c.554T>C	p.Ile185Thr	missense_variant	Exon 6 of 47	5		ENSP00000415090.1		Q6PIF6-1

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

151942

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.00

GnomAD3 exomes

AF:

0.00000806

AC:

AN:

248244

Hom.:

AF XY:

0.00000742

AC XY:

AN XY:

134722

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000584

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS 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:

0.00000548

AC:

AN:

1461116

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

726808

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000895

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.0000332

GnomAD4 genome

AF:

0.00000658

AC:

AN:

151942

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74216

show subpopulations

Gnomad4 AFR

AF:

0.0000242

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000642

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 31, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.554T>C (p.I185T) alteration is located in exon 6 (coding exon 5) of the MYO7B gene. This alteration results from a T to C substitution at nucleotide position 554, causing the isoleucine (I) at amino acid position 185 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.29

BayesDel_addAF

Pathogenic

0.27

BayesDel_noAF

Pathogenic

0.24

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.29

T;T

Eigen

Uncertain

0.59

Eigen_PC

Uncertain

0.61

FATHMM_MKL

Uncertain

0.97

LIST_S2

Pathogenic

0.98

D;.

M_CAP

Uncertain

0.20

MetaRNN

Pathogenic

0.90

D;D

MetaSVM

Uncertain

0.53

MutationAssessor

Benign

1.9

L;L

PrimateAI

Uncertain

0.68

PROVEAN

Pathogenic

-4.4

D;D

REVEL

Pathogenic

0.84

Sift

Uncertain

0.0010

D;D

Sift4G

Uncertain

0.048

D;D

Polyphen

0.93

P;P

Vest4

0.71

MutPred

0.80

Loss of catalytic residue at L190 (P = 0.0259);Loss of catalytic residue at L190 (P = 0.0259);

MVP

0.91

MPC

0.50

ClinPred

0.99

GERP RS

5.5

Varity_R

0.75

gMVP

0.71

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