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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot O14746: Variant p.Phe1127Leu

Telomerase reverse transcriptase
Gene: TERT
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Variant information Variant position: help 1127 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help LP/P [Disclaimer] The variants are classified into three categories: LP/P, LB/B and US.
  • LP/P: likely pathogenic or pathogenic.
  • LB/B: likely benign or benign.
  • US: uncertain significance

Residue change: help From Phenylalanine (F) to Leucine (L) at position 1127 (F1127L, p.Phe1127Leu). Indicates the amino acid change of the variant. The one-letter and three-letter codes for amino acids used in UniProtKB/Swiss-Prot are those adopted by the commission on Biochemical Nomenclature of the IUPAC-IUB.
Physico-chemical properties: help Change from large size and aromatic (F) to medium size and hydrophobic (L) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 0 The score within a Blosum matrix for the corresponding wild-type to variant amino acid change. The log-odds score measures the logarithm for the ratio of the likelihood of two amino acids appearing by chance. The Blosum62 substitution matrix is used. This substitution matrix contains scores for all possible exchanges of one amino acid with another:
  • Lowest score: -4 (low probability of substitution).
  • Highest score: 11 (high probability of substitution).
More information can be found on the following page

Variant description: help In DKCA2; severe; shortened telomeres but no effect on telomerase catalytic activity nor on binding to TERC. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 1127 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 1132 The length of the canonical sequence.
Location on the sequence: help LPGTTLTALEAAANPALPSD F KTILD The residue change on the sequence. Unless the variant is located at the beginning or at the end of the protein sequence, both residues upstream (20) and downstream (20) of the variant will be shown.
Residue conservation: help The multiple alignment of the region surrounding the variant against various orthologous sequences.
Human                         LPGTTLTALEAAANPALPSDFKTILD

                              LPRGTLAALEAAADPSLTADFKTILD

Mouse                         LPEATMTILKAAADPALSTDFQTILD

Rat                           LPEATMTLLKTAADPALSTDFQTILD

Bovine                        LPGPTRAALEAAADPALTADFKTILD

Baker's yeast                 I-----------------YIYIHIVN

Fission yeast                 IAD-----------------------

Sequence annotation in neighborhood: help The regions or sites of interest surrounding the variant. In general the features listed are posttranslational modifications, binding sites, enzyme active sites, local secondary structure or other characteristics reported in the cited references. The "Sequence annotation in neighborhood" lines have a fixed format:
  • Type: the type of sequence feature.
  • Positions: endpoints of the sequence feature.
  • Description: contains additional information about the feature.
TypePositionsDescription
Chain 1 – 1132 Telomerase reverse transcriptase
Region 936 – 1132 CTE
Alternative sequence 808 – 1132 Missing. In isoform 2 and isoform 4.
Turn 1125 – 1129



Literature citations
Mutations in the reverse transcriptase component of telomerase (TERT) in patients with bone marrow failure.
Vulliamy T.J.; Walne A.; Baskaradas A.; Mason P.J.; Marrone A.; Dokal I.;
Blood Cells Mol. Dis. 34:257-263(2005)
Cited for: VARIANT AA THR-202; VARIANTS DKCA2 TRP-979 AND LEU-1127; CHARACTERIZATION OF VARIANT AA THR-202; CHARACTERIZATION OF VARIANTS DKCA2 TRP-979 AND LEU-1127; Functional characterization of natural telomerase mutations found in patients with hematologic disorders.
Xin Z.T.; Beauchamp A.D.; Calado R.T.; Bradford J.W.; Regal J.A.; Shenoy A.; Liang Y.; Lansdorp P.M.; Young N.S.; Ly H.;
Blood 109:524-532(2007)
Cited for: VARIANT AA ASN-570; CHARACTERIZATION OF VARIANTS ASN-570; ASP-682; ARG-721; MET-726; ASN-902; TRP-979 AND LEU-1127;
Disclaimer: Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. They are not in any way intended to be used as a substitute for professional medical advice, diagnostic, treatment or care.