chr11-45949458-G-T

Variant names:

• chr11-45949458-G-T
• rs1554988946
• NM_001352027.3:c.1171C>A

Variant summary

Our verdict is Benign. The variant received -7 ACMG points: 0P and 7B. BP4_Moderate BP7 BS2

The NM_001352027.3(PHF21A):​c.1171C>A​(p.Arg391Arg) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000821 in 1,461,822 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000082 (0 hom.)
• Consequence: PHF21A NM_001352027.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.87
• Publications: 0 publications found

Genes affected

PHF21A (HGNC:24156): (PHD finger protein 21A) The PHF21A gene encodes BHC80, a component of a BRAF35 (MIM 605535)/histone deacetylase (HDAC; see MIM 601241) complex (BHC) that mediates repression of neuron-specific genes through the cis-regulatory element known as repressor element-1 (RE1) or neural restrictive silencer (NRS) (Hakimi et al., 2002 [PubMed 12032298]).[supplied by OMIM, Nov 2010]

PHF21A Gene-Disease associations (from GenCC):

• complex neurodevelopmental disorder

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• intellectual developmental disorder with behavioral abnormalities and craniofacial dysmorphism with or without seizures

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• Potocki-Shaffer syndrome

  Inheritance: AD Classification: STRONG Submitted by: G2P

ACMG classification

Our verdict: Benign. The variant received -7 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.41).
• BP7: Synonymous conserved (PhyloP=2.87 with no splicing effect.
• BS2: High AC in GnomAdExome4 at 12 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001352027.3. 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
	PHF21A	NM_001352027.3	MANE Select	c.1171C>A	p.Arg391Arg	synonymous	Exon 13 of 19	NP_001338956.1	Q96BD5-3
	PHF21A	NM_001441167.1		c.1192C>A	p.Arg398Arg	synonymous	Exon 12 of 18	NP_001428096.1
	PHF21A	NM_001441168.1		c.1192C>A	p.Arg398Arg	synonymous	Exon 13 of 19	NP_001428097.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PHF21A	ENST00000676320.1	MANE Select	c.1171C>A	p.Arg391Arg	synonymous	Exon 13 of 19	ENSP00000502222.1	Q96BD5-3
	PHF21A	ENST00000323180.10	TSL:1	c.1171C>A	p.Arg391Arg	synonymous	Exon 12 of 18	ENSP00000323152.6	Q96BD5-2
	PHF21A	ENST00000863274.1		c.1189C>A	p.Arg397Arg	synonymous	Exon 12 of 18	ENSP00000533333.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000821 AC: 12 AN: 1461822 Hom.: 0 Cov.: 31 AF XY: 0.00000413 AC XY: 3 AN XY: 727216

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: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53412

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

European-Non Finnish (NFE) AF: 0.0000108 AC: 12 AN: 1111954

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

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.41
CADD	Benign	10
DANN	Benign	0.61
PhyloP100		2.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.070		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: rs1554988946; hg19: chr11-45971009;