NM_001003681.3:c.784C>T

Variant names:

• chr22-35265172-C-T
• rs747728307
• NM_001003681.3:c.784C>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001003681.3(HMGXB4):​c.784C>T​(p.Pro262Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,870 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P262A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: HMGXB4 NM_001003681.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.53
• Publications: 2 publications found

Genes affected

HMGXB4 (HGNC:5003): (HMG-box containing 4) High mobility group (HMG) proteins are nonhistone chromosomal proteins. See HMG2 (MIM 163906) for additional information on HMG proteins.[supplied by OMIM, Nov 2010]

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.10582012).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HMGXB4	NM_001003681.3	c.784C>T	p.Pro262Ser	missense_variant	Exon 5 of 11	ENST00000216106.6	NP_001003681.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HMGXB4	ENST00000216106.6	c.784C>T	p.Pro262Ser	missense_variant	Exon 5 of 11	5	NM_001003681.3	ENSP00000216106.5

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461870 Hom.: 0 Cov.: 37 AF XY: 0.00000138 AC XY: 1 AN XY: 727232

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53408

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1112004

Other (OTH) AF: 0.00 AC: 0 AN: 60396

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.070
BayesDel_addAF	Benign	-0.21	T
BayesDel_noAF	Benign	-0.54
CADD	Benign	22
DANN	Benign	0.92
DEOGEN2	Benign	0.077	T;.;T
Eigen	Benign	-0.36
Eigen_PC	Benign	-0.19
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.77	T;T;T
M_CAP	Benign	0.0086	T
MetaRNN	Benign	0.11	T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.6	.;.;L
PhyloP100		2.5
PrimateAI	Benign	0.41	T
PROVEAN	Uncertain	-3.0	D;D;N
REVEL	Benign	0.055
Sift	Benign	0.090	T;T;T
Sift4G	Benign	0.74	T;T;T
Polyphen		0.0040	.;.;B
Vest4		0.27
MutPred		0.14		.;.;Gain of phosphorylation at P262 (P = 0.0093);
MVP		0.47
MPC		0.48
ClinPred		0.39	T
GERP RS		3.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.9
Varity_R		0.034
gMVP		0.16
Mutation Taster		=92/8	polymorphism

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: rs747728307; hg19: chr22-35661165;