Genetic Variant NM_001135580.2:c.322+15_322+18delCCCC (chr19-3543480-GCCCC-G) – 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_001135580.2(TEKTIP1):c.322+15_322+18delCCCC variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000823 in 1,215,534 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 0)

Exomes 𝑓: 8.2e-7 ( 0 hom. )

Consequence

TEKTIP1
NM_001135580.2 intron

Scores

Not classified

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.478

Publications

0 publications found

Variant links:

Genes affected

TEKTIP1 (HGNC:34496): (tektin bundle interacting protein 1)

TEKTIP1 links:

MFSD12 (HGNC:28299): (major facilitator superfamily domain containing 12) Enables cysteine transmembrane transporter activity. Involved in cysteine transmembrane transport; pigment metabolic process involved in pigmentation; and regulation of melanin biosynthetic process. Located in lysosome and melanosome. Part of late endosome. [provided by Alliance of Genome Resources, Apr 2022]

MFSD12 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
TEKTIP1	NM_001135580.2 link	c.322+15_322+18delCCCC		intron_variant	Intron 2 of 3	ENST00000329493.6	NP_001129052.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TEKTIP1	ENST00000329493.6 link	c.322+8_322+11delCCCC		splice_region_variant, intron_variant	Intron 2 of 3	2	NM_001135580.2	ENSP00000327950.4		A6NCJ1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

8.23e-7

AC:

AN:

1215534

Hom.:

AF XY:

0.00000167

AC XY:

AN XY:

599400

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:

28152

American (AMR)

AF:

0.00

AC:

AN:

33012

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

22134

East Asian (EAS)

AF:

0.00

AC:

AN:

33838

South Asian (SAS)

AF:

0.00

AC:

AN:

71462

European-Finnish (FIN)

AF:

0.00

AC:

AN:

37934

Middle Eastern (MID)

AF:

0.00

AC:

AN:

3624

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

933728

Other (OTH)

AF:

0.0000194

AC:

AN:

51650

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.225

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

PhyloP100

-0.48

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