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;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
UNC93B1	NM_030930.4 link	c.1210C>A	p.Pro404Thr	missense_variant	Exon 9 of 11	ENST00000227471.7	NP_112192.2	Q9H1C4
UNC93B1	XM_011545290.1 link	c.799C>A	p.Pro267Thr	missense_variant	Exon 7 of 9		XP_011543592.1
UNC93B1	XM_011545291.3 link	c.655C>A	p.Pro219Thr	missense_variant	Exon 6 of 8		XP_011543593.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
UNC93B1	ENST00000227471.7 link	c.1210C>A	p.Pro404Thr	missense_variant	Exon 9 of 11	1	NM_030930.4	ENSP00000227471.3		Q9H1C4
UNC93B1	ENST00000525368.1 link	n.217C>A		non_coding_transcript_exon_variant	Exon 1 of 3	2

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 v4.3

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over