chr7-87693957-A-T

Position:

• chr7-87693957-A-T

Variant summary

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

The NM_001134405.2(RUNDC3B):​c.239-6464A>T variant causes a intron 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. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: RUNDC3B NM_001134405.2 intron
• Scores: Splicing: ADA: 0.9989
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.40

Genes affected

RUNDC3B (HGNC:30286): (RUN domain containing 3B)

ABCB1 (HGNC:40): (ATP binding cassette subfamily B member 1) The membrane-associated protein encoded by this gene is a member of the superfamily of ATP-binding cassette (ABC) transporters. ABC proteins transport various molecules across extra- and intra-cellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, White). This protein is a member of the MDR/TAP subfamily. Members of the MDR/TAP subfamily are involved in multidrug resistance. The protein encoded by this gene is an ATP-dependent drug efflux pump for xenobiotic compounds with broad substrate specificity. It is responsible for decreased drug accumulation in multidrug-resistant cells and often mediates the development of resistance to anticancer drugs. This protein also functions as a transporter in the blood-brain barrier. Mutations in this gene are associated with colchicine resistance and Inflammatory bowel disease 13. Alternative splicing and the use of alternative promoters results in multiple transcript variants. [provided by RefSeq, Feb 2017]

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
RUNDC3B	NM_001134405.2	c.239-6464A>T		intron_variant		ENST00000394654.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RUNDC3B	ENST00000394654.4	c.239-6464A>T		intron_variant		2	NM_001134405.2	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

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

Jan 30, 2024

The c.288A>T (p.Q96H) alteration is located in exon 3 (coding exon 3) of the RUNDC3B gene. This alteration results from a A to T substitution at nucleotide position 288, causing the glutamine (Q) at amino acid position 96 to be replaced by a histidine (H). 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	0.18
BayesDel_addAF	Benign	-0.21	T
BayesDel_noAF	Benign	-0.53
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Benign	0.020	T
Eigen	Benign	-0.21
Eigen_PC	Benign	-0.067
FATHMM_MKL	Uncertain	0.86	D
LIST_S2	Benign	0.54	T
M_CAP	Benign	0.0034	T
MetaRNN	Benign	0.21	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.90	L
MutationTaster	Benign	1.0	D;D;D;N
PrimateAI	Uncertain	0.61	T
PROVEAN	Benign	-0.22	N
REVEL	Benign	0.11
Sift	Benign	0.23	T
Sift4G	Benign	0.19	T
Polyphen		0.34	B
Vest4		0.33
MutPred		0.72		Gain of catalytic residue at G97 (P = 0.1179);
MVP		0.27
MPC		0.17
ClinPred		0.35	T
GERP RS		3.9
Varity_R		0.095
gMVP		0.23

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.99
SpliceAI score (max)		0.20		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.20		Position offset: -49

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: chr7-87323273; COSMIC: COSV55965560;