chr4-144711988-A-G

Position:

• chr4-144711988-A-G

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 2P and 6B. PM1 BP4_Moderate BS2

The NM_022475.3(HHIP):​c.1340A>G​(p.Asn447Ser) variant causes a missense change. The variant allele was found at a frequency of 0.0000048 in 1,459,682 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000048 (0 hom.)
• Consequence: HHIP NM_022475.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.54

Genes affected

HHIP (HGNC:14866): (hedgehog interacting protein) This gene encodes a member of the hedgehog-interacting protein (HHIP) family. The hedgehog (HH) proteins are evolutionarily conserved protein, which are important morphogens for a wide range of developmental processes, including anteroposterior patterns of limbs and regulation of left-right asymmetry in embryonic development. Multiple cell-surface receptors are responsible for transducing and/or regulating HH signals. The HHIP encoded by this gene is a highly conserved, vertebrate-specific inhibitor of HH signaling. It interacts with all three HH family members, SHH, IHH and DHH. Two single nucleotide polymorphisms (SNPs) near this gene are significantly associated with risk of chronic obstructive pulmonary disease (COPD). A single nucleotide polymorphism in this gene is also strongly associated with human height.[provided by RefSeq, Feb 2011]

LOC124900791 (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -4 ACMG points.

• PM1: In a glycosylation_site N-linked (GlcNAc...) asparagine (size 0) in uniprot entity HHIP_HUMAN
• BP4: Computational evidence support a benign effect (MetaRNN=0.13622046).
• BS2: High AC in GnomAdExome4 at 7 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
HHIP	NM_022475.3	c.1340A>G	p.Asn447Ser	missense_variant	8/13	ENST00000296575.8
LOC124900791	XR_007058289.1	n.1305-7028T>C		intron_variant, non_coding_transcript_variant
HHIP	XM_005263178.6	c.1340A>G	p.Asn447Ser	missense_variant	8/14
HHIP	XM_006714288.5	c.1340A>G	p.Asn447Ser	missense_variant	8/14

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
HHIP	ENST00000296575.8	c.1340A>G	p.Asn447Ser	missense_variant	8/13	1	NM_022475.3	P1
HHIP	ENST00000512791.1	n.220A>G		non_coding_transcript_exon_variant	2/5	4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000480 AC: 7 AN: 1459682 Hom.: 0 Cov.: 28 AF XY: 0.00000826 AC XY: 6 AN XY: 726280

Gnomad4 AFR exome AF: 0.0000599

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000464

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.01e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.0000189

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 18, 2022

The c.1340A>G (p.N447S) alteration is located in exon 8 (coding exon 8) of the HHIP gene. This alteration results from a A to G substitution at nucleotide position 1340, causing the asparagine (N) at amino acid position 447 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.079
BayesDel_addAF	Benign	-0.37	T
BayesDel_noAF	Benign	-0.67
CADD	Benign	18
DANN	Benign	0.92
DEOGEN2	Benign	0.13	T
Eigen	Benign	-0.074
Eigen_PC	Benign	0.16
FATHMM_MKL	Uncertain	0.79	D
LIST_S2	Uncertain	0.91	D
M_CAP	Benign	0.0047	T
MetaRNN	Benign	0.14	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.39	N
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.60	T
PROVEAN	Benign	-0.75	N
REVEL	Benign	0.077
Sift	Benign	0.54	T
Sift4G	Benign	0.54	T
Polyphen		0.0020	B
Vest4		0.23
MutPred		0.47		Loss of catalytic residue at N447 (P = 0.0313);
MVP		0.27
MPC		0.16
ClinPred		0.27	T
GERP RS		5.7
Varity_R		0.48
gMVP		0.40

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

Publications

LitVar

Other links and lift over

dbSNP: rs200734620; hg19: chr4-145633140;