Genetic Variant SEPTIN7:p.Met350Ile (chr7-35898299-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_001788.6(SEPTIN7):c.1050G>T(p.Met350Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000858 in 1,399,160 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000086 ( 0 hom. )

Consequence

SEPTIN7
NM_001788.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 9.97

Publications

0 publications found

Variant links:

Genes affected

SEPTIN7 (HGNC:1717): (septin 7) This gene encodes a protein that is highly similar to the CDC10 protein of Saccharomyces cerevisiae. The protein also shares similarity with Diff 6 of Drosophila and with H5 of mouse. Each of these similar proteins, including the yeast CDC10, contains a GTP-binding motif. The yeast CDC10 protein is a structural component of the 10 nm filament which lies inside the cytoplasmic membrane and is essential for cytokinesis. This human protein functions in gliomagenesis and in the suppression of glioma cell growth, and it is required for the association of centromere-associated protein E with the kinetochore. Alternative splicing results in multiple transcript variants. Several related pseudogenes have been identified on chromosomes 5, 7, 9, 10, 11, 14, 17 and 19. [provided by RefSeq, Jul 2011]

SEPTIN7 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
SEPTIN7	NM_001788.6 link	c.1050G>T	p.Met350Ile	missense_variant	Exon 12 of 14	ENST00000350320.11	NP_001779.3	Q16181-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SEPTIN7	ENST00000350320.11 link	c.1050G>T	p.Met350Ile	missense_variant	Exon 12 of 14	5	NM_001788.6	ENSP00000344868.8	Q16181-1E7EPK1
SEPTIN7	ENST00000635175.1 link	n.*967G>T		non_coding_transcript_exon_variant	Exon 12 of 14	2		ENSP00000489192.1	A0A0U1RQW0
SEPTIN7	ENST00000635175.1 link	n.*967G>T		3_prime_UTR_variant	Exon 12 of 14	2		ENSP00000489192.1	A0A0U1RQW0

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000858

AC:

AN:

1399160

Hom.:

Cov.:

AF XY:

0.00000724

AC XY:

AN XY:

690354

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

31614

American (AMR)

AF:

0.00

AC:

AN:

35916

Ashkenazi Jewish (ASJ)

AF:

0.0000399

AC:

AN:

25090

East Asian (EAS)

AF:

0.00

AC:

AN:

35842

South Asian (SAS)

AF:

0.00

AC:

AN:

79070

European-Finnish (FIN)

AF:

0.00

AC:

AN:

49408

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5660

European-Non Finnish (NFE)

AF:

0.0000102

AC:

AN:

1078544

Other (OTH)

AF:

0.00

AC:

AN:

58016

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.413

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 07, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.1050G>T (p.M350I) alteration is located in exon 12 (coding exon 12) of the SEPT7 gene. This alteration results from a G to T substitution at nucleotide position 1050, causing the methionine (M) at amino acid position 350 to be replaced by an isoleucine (I). 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

Pathogenic

0.98

BayesDel_addAF

Benign

-0.017

BayesDel_noAF

Benign

-0.26

CADD

Pathogenic

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.051

.;T;T;T;T

Eigen

Benign

0.039

Eigen_PC

Benign

0.17

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.85

T;T;T;T;T

M_CAP

Benign

0.015

MetaRNN

Uncertain

0.48

T;T;T;T;T

MetaSVM

Benign

-0.95

PhyloP100

PrimateAI

Pathogenic

0.92

REVEL

Benign

0.28

Sift4G

Benign

0.098

T;T;T;T;T

Vest4

0.56

MutPred

0.37

.;Gain of methylation at K351 (P = 0.0229);.;.;.;

MVP

0.69

MPC

2.0

ClinPred

0.89

GERP RS

4.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

2.8

gMVP

0.84

Mutation Taster

=49/51

disease causing

(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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7-35898299-G-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over