chr16-1706634-G-T

Position:

• chr16-1706634-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_001318852.2(MAPK8IP3):​c.295G>T​(p.Ala99Ser) variant causes a missense change. The variant allele was found at a frequency of 0.00000141 in 1,417,132 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: MAPK8IP3 NM_001318852.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.42

Genes affected

MAPK8IP3 (HGNC:6884): (mitogen-activated protein kinase 8 interacting protein 3) The protein encoded by this gene shares similarity with the product of Drosophila syd gene, required for the functional interaction of kinesin I with axonal cargo. Studies of the similar gene in mouse suggested that this protein may interact with, and regulate the activity of numerous protein kinases of the JNK signaling pathway, and thus function as a scaffold protein in neuronal cells. The C. elegans counterpart of this gene is found to regulate synaptic vesicle transport possibly by integrating JNK signaling and kinesin-1 transport. Several alternatively spliced transcript variants of this gene have been described, but the full-length nature of some of these variants has not been determined. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 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), MAPK8IP3. . Gene score misZ 2.8844 (greater than the threshold 3.09). Trascript score misZ 3.4182 (greater than threshold 3.09). GenCC has associacion of gene with neurodevelopmental disorder with or without variable brain abnormalities; NEDBA.
• BP4: Computational evidence support a benign effect (MetaRNN=0.11284116).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MAPK8IP3	NM_001318852.2	c.295G>T	p.Ala99Ser	missense_variant	1/32	ENST00000610761.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MAPK8IP3	ENST00000610761.2	c.295G>T	p.Ala99Ser	missense_variant	1/32	1	NM_001318852.2	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000141 AC: 2 AN: 1417132 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 701210

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000183

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 16, 2024

The c.295G>T (p.A99S) alteration is located in exon 1 (coding exon 1) of the MAPK8IP3 gene. This alteration results from a G to T substitution at nucleotide position 295, causing the alanine (A) at amino acid position 99 to be replaced by a serine (S). 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	0.090
BayesDel_addAF	Benign	-0.21	T
BayesDel_noAF	Benign	-0.54
CADD	Uncertain	25
DANN	Benign	0.88
DEOGEN2	Benign	0.14	T;T;.
Eigen	Benign	-0.25
Eigen_PC	Benign	-0.17
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Uncertain	0.91	D;D;D
M_CAP	Uncertain	0.18	D
MetaRNN	Benign	0.11	T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.3	L;.;.
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.72	T
PROVEAN	Benign	-0.28	N;N;.
REVEL	Benign	0.079
Sift	Benign	0.40	T;T;.
Sift4G	Benign	0.42	T;T;T
Polyphen		0.0010	B;B;.
Vest4		0.17
MutPred		0.36		Gain of phosphorylation at A99 (P = 0.0019);Gain of phosphorylation at A99 (P = 0.0019);Gain of phosphorylation at A99 (P = 0.0019);
MVP		0.56
MPC		0.67
ClinPred		0.43	T
GERP RS		2.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.7
Varity_R		0.066
gMVP		0.71

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs2037400078; hg19: chr16-1756635;