Genetic Variant UNC93B1:p.Pro404Thr (chr11-67995764-G-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_030930.4(UNC93B1):c.1210C>A(p.Pro404Thr) variant causes a missense change. The variant allele was found at a frequency of 0.00000215 in 1,396,206 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. P404S) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 29)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

UNC93B1
NM_030930.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 4.37

Publications

1 publications found

Variant links:

Genes affected

UNC93B1 (HGNC:13481): (unc-93 homolog B1, TLR signaling regulator) This gene encodes a protein that is involved in innate and adaptive immune response by regulating toll-like receptor signaling. The encoded protein traffics nucleotide sensing toll-like receptors to the endolysosome from the endoplasmic reticulum. Deficiency of the encoded protein has been associated with herpes simplex encephalitis. [provided by RefSeq, Feb 2014]

UNC93B1 Gene-Disease associations (from GenCC):

herpes simplex encephalitis, susceptibility to, 1
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)

UNC93B1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_030930.4. 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
	UNC93B1	NM_030930.4	MANE Select	c.1210C>A	p.Pro404Thr	missense	Exon 9 of 11	NP_112192.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	UNC93B1	ENST00000227471.7	TSL:1 MANE Select	c.1210C>A	p.Pro404Thr	missense	Exon 9 of 11	ENSP00000227471.3
	UNC93B1	ENST00000525368.1	TSL:2	n.217C>A		non_coding_transcript_exon	Exon 1 of 3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000664

AC:

AN:

150598

AF XY:

0.0000124

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

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:

0.00000215

AC:

AN:

1396206

Hom.:

Cov.:

AF XY:

0.00000290

AC XY:

AN XY:

688704

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

31530

American (AMR)

AF:

0.00

AC:

AN:

35716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25156

East Asian (EAS)

AF:

0.00

AC:

AN:

35746

South Asian (SAS)

AF:

0.0000126

AC:

AN:

79156

European-Finnish (FIN)

AF:

0.00

AC:

AN:

48176

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4062

European-Non Finnish (NFE)

AF:

0.00000185

AC:

AN:

1078868

Other (OTH)

AF:

0.00

AC:

AN:

57796

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.00131091), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.392

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

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

-0.060

BayesDel_noAF

Benign

-0.20

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.12

Eigen

Uncertain

0.45

Eigen_PC

Uncertain

0.50

FATHMM_MKL

Uncertain

0.92

LIST_S2

Benign

0.83

M_CAP

Benign

0.014

MetaRNN

Uncertain

0.46

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.5

PhyloP100

4.4

PrimateAI

Uncertain

0.63

REVEL

Benign

0.16

Sift4G

Benign

0.44

Polyphen

0.99

Vest4

0.49

MutPred

0.42

Gain of sheet (P = 0.1208)

MVP

0.068

MPC

1.3

ClinPred

0.89

GERP RS

5.4

Varity_R

0.12

gMVP

0.40

Mutation Taster

=81/19

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

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over