chr17-58522088-C-T

Position:

• chr17-58522088-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001368771.2(SEPTIN4):​c.2230G>A​(p.Ala744Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: SEPTIN4 NM_001368771.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.40

Genes affected

SEPTIN4 (HGNC:9165): (septin 4) This gene is a member of the septin family of nucleotide binding proteins, originally described in yeast as cell division cycle regulatory proteins. Septins are highly conserved in yeast, Drosophila, and mouse, and appear to regulate cytoskeletal organization. Disruption of septin function disturbs cytokinesis and results in large multinucleate or polyploid cells. This gene is highly expressed in brain and heart. Alternatively spliced transcript variants encoding different isoforms have been described for this gene. One of the isoforms (known as ARTS) is distinct; it is localized to the mitochondria, and has a role in apoptosis and cancer. [provided by RefSeq, Nov 2010]

SEPTIN4-AS1 (HGNC:51345): (SEPTIN4 antisense RNA 1)

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.20949435).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SEPTIN4	NM_001368771.2	c.2230G>A	p.Ala744Thr	missense_variant	8/14	ENST00000672673.2
SEPTIN4-AS1	NR_110810.1	n.141+2111C>T		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SEPTIN4	ENST00000672673.2	c.2230G>A	p.Ala744Thr	missense_variant	8/14		NM_001368771.2	P1
SEPTIN4-AS1	ENST00000580589.5	n.141+2111C>T		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 28, 2023

The c.676G>A (p.A226T) alteration is located in exon 6 (coding exon 6) of the SEPT4 gene. This alteration results from a G to A substitution at nucleotide position 676, causing the alanine (A) at amino acid position 226 to be replaced by a threonine (T). 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	Benign	0.13
BayesDel_addAF	Benign	-0.098	T
BayesDel_noAF	Benign	-0.38
CADD	Uncertain	24
DANN	Benign	0.92
DEOGEN2	Benign	0.012	.;.;.;T;T;.;T;.;.;T;T
Eigen	Benign	-0.12
Eigen_PC	Benign	0.071
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Uncertain	0.89	D;D;D;D;D;D;D;.;D;D;D
M_CAP	Benign	0.0085	T
MetaRNN	Benign	0.21	T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	-0.23	.;.;.;.;N;.;.;.;.;.;.
MutationTaster	Benign	1.0	D;D;D;D;D;D;D;D;D;D
PrimateAI	Uncertain	0.72	T
PROVEAN	Benign	-0.39	N;.;N;.;N;.;.;N;N;.;.
REVEL	Benign	0.074
Sift	Benign	0.55	T;.;T;.;T;.;.;T;T;.;.
Sift4G	Benign	0.50	T;T;T;T;T;T;T;T;T;T;T
Polyphen		0.077	B;B;B;.;B;D;.;B;B;.;.
Vest4		0.36
MutPred		0.37		.;.;.;.;Gain of ubiquitination at K223 (P = 0.1047);.;.;.;.;.;.;
MVP		0.49
MPC		0.94
ClinPred		0.89	D
GERP RS		5.1
Varity_R		0.14
gMVP		0.45

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr17-56599449;