NM_005105.5:c.403A>C

Variant names:

• chr1-145926117-T-G
• rs1261034450
• NM_005105.5:c.403A>C

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_005105.5(RBM8A):​c.403A>C​(p.Asn135His) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. N135S) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 31)
• Consequence: RBM8A NM_005105.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 6.97
• Publications: 1 publications found

Genes affected

RBM8A (HGNC:9905): (RNA binding motif protein 8A) This gene encodes a protein with a conserved RNA-binding motif. The protein is found predominantly in the nucleus, although it is also present in the cytoplasm. It is preferentially associated with mRNAs produced by splicing, including both nuclear mRNAs and newly exported cytoplasmic mRNAs. It is thought that the protein remains associated with spliced mRNAs as a tag to indicate where introns had been present, thus coupling pre- and post-mRNA splicing events. Previously, it was thought that two genes encode this protein, RBM8A and RBM8B; it is now thought that the RBM8B locus is a pseudogene. There are two alternate translation start codons with this gene, which result in two forms of the protein. An allele mutation and a low-frequency noncoding single-nucleotide polymorphism (SNP) in this gene cause thrombocytopenia-absent radius (TAR) syndrome. [provided by RefSeq, Jul 2013]

RBM8A Gene-Disease associations (from GenCC):

• thrombocytopenia-absent radius syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Laboratory for Molecular Medicine, Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics, ClinGen

ENSG00000289565 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

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

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005105.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RBM8A	NM_005105.5	MANE Select	c.403A>C	p.Asn135His	missense	Exon 5 of 6	NP_005096.1	Q9Y5S9-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RBM8A	ENST00000583313.7	TSL:1 MANE Select	c.403A>C	p.Asn135His	missense	Exon 5 of 6	ENSP00000463058.2	Q9Y5S9-1
	RBM8A	ENST00000369307.4	TSL:1	c.400A>C	p.Asn134His	missense	Exon 5 of 6	ENSP00000358313.3	Q9Y5S9-2
	ENSG00000289565	ENST00000632040.1	TSL:2	n.196A>C		non_coding_transcript_exon	Exon 2 of 5	ENSP00000488887.1	A0A0J9YW13

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	not provided (1)
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.22
BayesDel_noAF	Pathogenic	0.30
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.19	T
LIST_S2	Uncertain	0.94	D
MetaRNN	Uncertain	0.73	D
PhyloP100		7.0
PROVEAN	Uncertain	-4.2	D
Sift	Benign	0.12	T
Sift4G	Benign	0.11	T
Vest4		0.67
gMVP		0.98

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

Other links and lift over

dbSNP: rs1261034450; hg19: chr1-145508976;