Genetic Variant STAR:c.179-133G>A (chr8-38148460-C-T) – 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_000349.3(STAR):c.179-133G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000375 in 1,334,196 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000037 ( 0 hom. )

Consequence

STAR
NM_000349.3 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.155

Publications

1 publications found

Variant links:

Genes affected

STAR (HGNC:11359): (steroidogenic acute regulatory protein) The protein encoded by this gene plays a key role in the acute regulation of steroid hormone synthesis by enhancing the conversion of cholesterol into pregnenolone. This protein permits the cleavage of cholesterol into pregnenolone by mediating the transport of cholesterol from the outer mitochondrial membrane to the inner mitochondrial membrane. Mutations in this gene are a cause of congenital lipoid adrenal hyperplasia (CLAH), also called lipoid CAH. A pseudogene of this gene is located on chromosome 13. [provided by RefSeq, Jul 2008]

STAR Gene-Disease associations (from GenCC):

congenital lipoid adrenal hyperplasia due to STAR deficency
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), Myriad Women’s Health

STAR 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 (BayesDel_noAF=-0.81).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
STAR	NM_000349.3 link	c.179-133G>A		intron_variant	Intron 2 of 6	ENST00000276449.9	NP_000340.2	P49675Q6IBK0

Ensembl

Gene	Transcript	HGVSc	Effect	Exon rank	TSL	MANE	Protein	UniProt
STAR	ENST00000276449.9 link	c.179-133G>A	intron_variant	Intron 2 of 6	1	NM_000349.3	ENSP00000276449.3	P49675
STAR	ENST00000520114.1 link	n.533G>A	non_coding_transcript_exon_variant	Exon 2 of 4	2
STAR	ENST00000522050.1 link	c.113-133G>A	intron_variant	Intron 1 of 4	5		ENSP00000429009.1	H0YB94
STAR	ENST00000521236.1 link	c.-100-101G>A	intron_variant	Intron 2 of 3	3		ENSP00000430030.1	E5RH12

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000375

AC:

AN:

1334196

Hom.:

Cov.:

AF XY:

0.00000301

AC XY:

AN XY:

663994

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

30592

American (AMR)

AF:

0.00

AC:

AN:

36614

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

24796

East Asian (EAS)

AF:

0.00

AC:

AN:

36302

South Asian (SAS)

AF:

0.00

AC:

AN:

79106

European-Finnish (FIN)

AF:

0.00

AC:

AN:

42758

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4012

European-Non Finnish (NFE)

AF:

0.00000488

AC:

AN:

1023908

Other (OTH)

AF:

0.00

AC:

AN:

56108

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

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.:

Alfa

AF:

0.00

Hom.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.81

CADD

Benign

7.1

(source)

DANN

Benign

0.64

PhyloP100

0.15

PromoterAI

-0.00010

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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