7-123457505-C-A

Position:

• chr7-123457505-C-A

Variant summary

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

The NM_178827.5(IQUB):​c.2069G>T​(p.Cys690Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,459,412 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: IQUB NM_178827.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.27

Genes affected

IQUB (HGNC:21995): (IQ motif and ubiquitin domain containing) Predicted to be involved in cilium assembly. Predicted to act upstream of or within smoothened signaling pathway. Predicted to be active in acrosomal vesicle and motile cilium. [provided by Alliance of Genome Resources, Apr 2022]

(HGNC:):

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=0.080714196).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
IQUB	NM_178827.5	c.2069G>T	p.Cys690Phe	missense_variant	12/13	ENST00000324698.11	NP_849149.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
IQUB	ENST00000324698.11	c.2069G>T	p.Cys690Phe	missense_variant	12/13	1	NM_178827.5	ENSP00000324882	P1
	ENST00000419832.1	n.244C>A		non_coding_transcript_exon_variant	2/3	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1459412 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 726060

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000226

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: 0.00

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

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 06, 2021

The c.2069G>T (p.C690F) alteration is located in exon 12 (coding exon 11) of the IQUB gene. This alteration results from a G to T substitution at nucleotide position 2069, causing the cysteine (C) at amino acid position 690 to be replaced by a phenylalanine (F). 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	0.10
BayesDel_addAF	Benign	-0.21	T
BayesDel_noAF	Benign	-0.53
CADD	Benign	18
DANN	Benign	0.61
DEOGEN2	Benign	0.023	T;T
Eigen	Benign	-0.37
Eigen_PC	Benign	-0.22
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Benign	0.71	.;T
M_CAP	Benign	0.0082	T
MetaRNN	Benign	0.081	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.2	L;L
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.33	T
PROVEAN	Benign	-0.050	N;N
REVEL	Benign	0.030
Sift	Benign	0.43	T;T
Sift4G	Benign	0.70	T;T
Polyphen		0.015	B;B
Vest4		0.27
MutPred		0.38		Gain of catalytic residue at C690 (P = 0.0581);Gain of catalytic residue at C690 (P = 0.0581);
MVP		0.19
MPC		0.027
ClinPred		0.20	T
GERP RS		5.6
Varity_R		0.19
gMVP		0.48

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr7-123097559;