9-123382083-C-G

Variant summary

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

The NM_001352964.2(DENND1A):c.2562G>C(p.Trp854Cys) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: DENND1A NM_001352964.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.39

Genes affected

DENND1A (HGNC:29324): (DENN domain containing 1A) Clathrin (see MIM 118955)-mediated endocytosis is a major mechanism for internalization of proteins and lipids. Members of the connecdenn family, such as DENND1A, function as guanine nucleotide exchange factors (GEFs) for the early endosomal small GTPase RAB35 (MIM 604199) and bind to clathrin and clathrin adaptor protein-2 (AP2; see MIM 601024). Thus, connecdenns link RAB35 activation with the clathrin machinery (Marat and McPherson, 2010 [PubMed 20154091]).[supplied by OMIM, Nov 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DENND1A	NM_001352964.2	c.2562G>C	p.Trp854Cys	missense_variant	24/24	ENST00000394215.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DENND1A	ENST00000394215.7	c.2562G>C	p.Trp854Cys	missense_variant	24/24	5	NM_001352964.2	A2
DENND1A	ENST00000473039.5	n.2371G>C		non_coding_transcript_exon_variant	18/18	1
DENND1A	ENST00000373624.6	c.2379G>C	p.Trp793Cys	missense_variant	22/22	5		P2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 72

GnomAD4 genome Cov.: 32

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

Sep 16, 2021

The c.2379G>C (p.W793C) alteration is located in exon 22 (coding exon 22) of the DENND1A gene. This alteration results from a G to C substitution at nucleotide position 2379, causing the tryptophan (W) at amino acid position 793 to be replaced by a cysteine (C). 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	0.31
BayesDel_addAF	Benign	-0.077	T
BayesDel_noAF	Benign	-0.35
Cadd	Uncertain	25
Dann	Uncertain	0.99
DEOGEN2	Benign	0.067	T
Eigen	Uncertain	0.44
Eigen_PC	Uncertain	0.43
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Benign	0.85	D
M_CAP	Benign	0.020	T
MetaRNN	Uncertain	0.57	D
MetaSVM	Benign	-0.99	T
MutationAssessor	Uncertain	2.6	M
MutationTaster	Benign	0.80	D;D;D
PrimateAI	Uncertain	0.63	T
PROVEAN	Benign	-2.3	N
REVEL	Benign	0.23
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.038	D
Polyphen		1.0	D
Vest4		0.72
MutPred		0.23		Loss of glycosylation at T791 (P = 0.0518);
MVP		0.15
MPC		1.2
ClinPred		0.91	D
GERP RS		4.8
Varity_R		0.19
gMVP		0.37

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: rs2042304198; hg19: chr9-126144362;