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NM_000492.4(CFTR):c.1666A>C (p.Ile556Leu) AND Cystic fibrosis

Germline classification:
Uncertain significance (1 submission)
Last evaluated:
Sep 26, 2021
Review status:
1 star out of maximum of 4 stars
criteria provided, single submitter
Somatic classification
of clinical impact:
None
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Somatic classification
of oncogenicity:
None
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Record status:
current
Accession:
RCV002403892.2

Allele description [Variation Report for NM_000492.4(CFTR):c.1666A>C (p.Ile556Leu)]

NM_000492.4(CFTR):c.1666A>C (p.Ile556Leu)

Genes:
CFTR:CF transmembrane conductance regulator [Gene - OMIM - HGNC]
LOC111674475:CFTR intron 11 enhancer [Gene]
Variant type:
single nucleotide variant
Cytogenetic location:
7q31.2
Genomic location:
Preferred name:
NM_000492.4(CFTR):c.1666A>C (p.Ile556Leu)
HGVS:
  • NC_000007.14:g.117587820A>C
  • NG_016465.4:g.127037A>C
  • NG_056131.3:g.775A>C
  • NM_000492.4:c.1666A>CMANE SELECT
  • NP_000483.3:p.Ile556Leu
  • NP_000483.3:p.Ile556Leu
  • LRG_663t1:c.1666A>C
  • LRG_663:g.127037A>C
  • LRG_663p1:p.Ile556Leu
  • NC_000007.13:g.117227874A>C
  • NM_000492.3:c.1666A>C
Protein change:
I556L
Molecular consequence:
  • NM_000492.4:c.1666A>C - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:
Cystic fibrosis (CF)
Synonyms:
Mucoviscidosis
Identifiers:
MONDO: MONDO:0009061; MedGen: C0010674; Orphanet: 586; OMIM: 219700

Recent activity

Assertion and evidence details

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Submission AccessionSubmitterReview Status
(Assertion method)		Clinical Significance
(Last evaluated)		OriginMethodCitations
SCV002708418Ambry Genetics
criteria provided, single submitter

(Ambry Variant Classification Scheme 2023)		Uncertain significance
(Sep 26, 2021) 		germlineclinical testing

Citation Link

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Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineunknownnot providednot providednot providednot providednot providedclinical testing

Details of each submission

From Ambry Genetics, SCV002708418.2

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testingnot provided

Description

The p.I556L variant (also known as c.1666A>C), located in coding exon 12 of the CFTR gene, results from an A to C substitution at nucleotide position 1666. The isoleucine at codon 556 is replaced by leucine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

Last Updated: May 1, 2024