4-173371357-G-T

Variant names:

• chr4-173371357-G-T
• rs1443902373
• NM_003864.4:c.175G>T

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_003864.4(SAP30):​c.175G>T​(p.Ala59Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000744 in 1,344,982 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 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. A59T) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 7.4e-7 (0 hom.)
• Consequence: SAP30 NM_003864.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.38
• Publications: 0 publications found

Genes affected

SAP30 (HGNC:10532): (Sin3A associated protein 30) Histone acetylation plays a key role in the regulation of eukaryotic gene expression. Histone acetylation and deacetylation are catalyzed by multisubunit complexes. The protein encoded by this gene is a component of the histone deacetylase complex, which includes SIN3, SAP18, HDAC1, HDAC2, RbAp46, RbAp48, and other polypeptides. This complex is active in deacetylating core histone octamers, but inactive in deacetylating nucleosomal histones. A pseudogene of this gene is located on chromosome 3. [provided by RefSeq, Jul 2008]

SAP30-DT (HGNC:54424): (SAP30 divergent transcript)

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2893585).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003864.4. 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
	SAP30	NM_003864.4	MANE Select	c.175G>T	p.Ala59Ser	missense	Exon 1 of 4	NP_003855.1	O75446

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SAP30	ENST00000296504.4	TSL:1 MANE Select	c.175G>T	p.Ala59Ser	missense	Exon 1 of 4	ENSP00000296504.3	O75446
	SAP30	ENST00000932477.1		c.175G>T	p.Ala59Ser	missense	Exon 1 of 3	ENSP00000602536.1
	SAP30-DT	ENST00000725023.1		n.133+377C>A		intron	N/A

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 7.44e-7 AC: 1 AN: 1344982 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 668528

African (AFR) AF: 0.00 AC: 0 AN: 27136

American (AMR) AF: 0.00 AC: 0 AN: 28530

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 22466

East Asian (EAS) AF: 0.00 AC: 0 AN: 31120

South Asian (SAS) AF: 0.00 AC: 0 AN: 75804

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 34878

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4838

European-Non Finnish (NFE) AF: 9.39e-7 AC: 1 AN: 1065274

Other (OTH) AF: 0.00 AC: 0 AN: 54936

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.077
BayesDel_addAF	Benign	-0.031	T
BayesDel_noAF	Benign	-0.28
CADD	Uncertain	23
DANN	Uncertain	0.98
DEOGEN2	Benign	0.0077	T
Eigen	Benign	-0.12
Eigen_PC	Benign	-0.23
FATHMM_MKL	Benign	0.48	N
LIST_S2	Benign	0.43	T
M_CAP	Pathogenic	0.44	D
MetaRNN	Benign	0.29	T
MetaSVM	Benign	-0.96	T
MutationAssessor	Benign	0.69	N
PhyloP100		3.4
PrimateAI	Pathogenic	0.91	D
PROVEAN	Benign	-0.21	N
REVEL	Benign	0.14
Sift	Benign	0.47	T
Sift4G	Benign	0.43	T
Polyphen		0.97	D
Vest4		0.14
MutPred		0.13		Loss of glycosylation at P56 (P = 0.0057)
MVP		0.51
MPC		1.2
ClinPred		0.53	D
GERP RS		3.1
PromoterAI		-0.067	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.2
Varity_R		0.092
gMVP		0.30
Mutation Taster		=84/16	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: rs1443902373; hg19: chr4-174292508;