chr14-50560284-G-A

Position:

• chr14-50560284-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The NM_015915.5(ATL1):​c.19G>A​(p.Asp7Asn) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: ATL1 NM_015915.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.93

Genes affected

ATL1 (HGNC:11231): (atlastin GTPase 1) The protein encoded by this gene is a GTPase and a Golgi body transmembrane protein. The encoded protein can form a homotetramer and has been shown to interact with spastin and with mitogen-activated protein kinase kinase kinase kinase 4. This protein may be involved in axonal maintenance as evidenced by the fact that defects in this gene are a cause of spastic paraplegia type 3. Three transcript variants encoding two different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

MAP4K5 (HGNC:6867): (mitogen-activated protein kinase kinase kinase kinase 5) This gene encodes a member of the serine/threonine protein kinase family, that is highly similar to yeast SPS1/STE20 kinase. Yeast SPS1/STE20 functions near the beginning of the MAP kinase signal cascades that is essential for yeast pheromone response. This kinase was shown to activate Jun kinase in mammalian cells, which suggested a role in stress response. Two alternatively spliced transcript variants encoding the same protein have been described for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), ATL1. . Gene score misZ 2.6313 (greater than the threshold 3.09). Trascript score misZ 3.8383 (greater than threshold 3.09). GenCC has associacion of gene with hereditary sensory and autonomic neuropathy type 1, hereditary spastic paraplegia 3A, neuropathy, hereditary sensory, type 1D.
• BP4: Computational evidence support a benign effect (MetaRNN=0.29505473).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ATL1	NM_015915.5	c.19G>A	p.Asp7Asn	missense_variant	1/14	ENST00000358385.12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ATL1	ENST00000358385.12	c.19G>A	p.Asp7Asn	missense_variant	1/14	1	NM_015915.5	P3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Aug 17, 2019

Not observed in large population cohorts (Lek et al., 2016); In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.19
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.39
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.012	.;T;.;T
Eigen	Uncertain	0.49
Eigen_PC	Uncertain	0.54
FATHMM_MKL	Benign	0.74	D
LIST_S2	Uncertain	0.91	D;D;T;D
M_CAP	Benign	0.080	D
MetaRNN	Benign	0.30	T;T;T;T
MetaSVM	Uncertain	-0.072	T
MutationAssessor	Benign	0.34	N;.;.;N
MutationTaster	Benign	0.71	D;D;D;D
PrimateAI	Uncertain	0.66	T
PROVEAN	Benign	-0.030	N;N;D;N
REVEL	Benign	0.20
Sift	Benign	0.049	D;D;.;D
Sift4G	Benign	0.077	T;T;D;T
Polyphen		0.98	.;.;.;D
Vest4		0.20
MutPred		0.15		Gain of MoRF binding (P = 0.1273);Gain of MoRF binding (P = 0.1273);Gain of MoRF binding (P = 0.1273);Gain of MoRF binding (P = 0.1273);
MVP		0.78
MPC		0.67
ClinPred		0.93	D
GERP RS		5.4
Varity_R		0.12
gMVP		0.19

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

LitVar

Other links and lift over

dbSNP: rs2038819987; hg19: chr14-51027002;