X-153952837-G-C

Variant names:

• chrX-153952837-G-C
• rs781788935
• NM_005334.3:c.4619C>G

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_005334.3(HCFC1):​c.4619C>G​(p.Thr1540Ser) variant causes a missense 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. 15/21 in silico tools predict a benign outcome for this variant. 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. T1540I) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 26)
• Consequence: HCFC1 NM_005334.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.0410
• Publications: 1 publications found

Genes affected

HCFC1 (HGNC:4839): (host cell factor C1) This gene is a member of the host cell factor family and encodes a protein with five Kelch repeats, a fibronectin-like motif, and six HCF repeats, each of which contains a highly specific cleavage signal. This nuclear coactivator is proteolytically cleaved at one of the six possible sites, resulting in the creation of an N-terminal chain and the corresponding C-terminal chain. The final form of this protein consists of noncovalently bound N- and C-terminal chains. The protein is involved in control of the cell cycle and transcriptional regulation during herpes simplex virus infection. Alternatively spliced variants which encode different protein isoforms have been described; however, not all variants have been fully characterized. [provided by RefSeq, Jul 2008]

HCFC1 Gene-Disease associations (from GenCC):

• methylmalonic acidemia with homocystinuria, type cblX

  Inheritance: XL Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: G2P, Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae)
• X-linked intellectual disability

  Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen, Illumina
• non-syndromic X-linked intellectual disability

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.01876688).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005334.3. 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
	HCFC1	NM_005334.3	MANE Select	c.4619C>G	p.Thr1540Ser	missense	Exon 19 of 26	NP_005325.2
	HCFC1	NM_001440843.1		c.4751C>G	p.Thr1584Ser	missense	Exon 19 of 26	NP_001427772.1
	HCFC1	NM_001410705.1		c.4751C>G	p.Thr1584Ser	missense	Exon 19 of 26	NP_001397634.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HCFC1	ENST00000310441.12	TSL:1 MANE Select	c.4619C>G	p.Thr1540Ser	missense	Exon 19 of 26	ENSP00000309555.7
	HCFC1	ENST00000925202.1		c.4751C>G	p.Thr1584Ser	missense	Exon 19 of 26	ENSP00000595261.1
	HCFC1	ENST00000369984.4	TSL:5	c.4751C>G	p.Thr1584Ser	missense	Exon 19 of 26	ENSP00000359001.4

Frequencies

GnomAD3 genomes Cov.: 26

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 26

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Methylmalonic acidemia with homocystinuria, type cblX (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.081
BayesDel_addAF	Benign	-0.51	T
BayesDel_noAF	Benign	-0.98
CADD	Benign	13
DANN	Benign	0.71
DEOGEN2	Benign	0.070	T
FATHMM_MKL	Benign	0.31	N
LIST_S2	Benign	0.53	T
M_CAP	Benign	0.0047	T
MetaRNN	Benign	0.019	T
MetaSVM	Benign	-0.92	T
MutationAssessor	Benign	-1.4	N
PhyloP100		-0.041
PrimateAI	Benign	0.40	T
PROVEAN	Benign	0.020	N
REVEL	Benign	0.021
Sift	Benign	0.44	T
Sift4G	Benign	0.90	T
Polyphen		0.0	B
Vest4		0.028
MutPred		0.20		Loss of sheet (P = 0.0817)
MVP		0.14
MPC		0.49
ClinPred		0.051	T
GERP RS		-2.4
Varity_R		0.040
gMVP		0.22
Mutation Taster		=97/3	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: rs781788935; hg19: chrX-153218288;