Leishmania major telomerase TERT protein has a nuclear/mitochondrial eclipsed distribution that is affected by oxidative stress.

Abstract:

:In its canonical role the reverse transcriptase telomerase recovers the telomeric repeats that are lost during DNA replication. Other locations and activities have been recently described for the telomerase protein subunit TERT in mammalian cells. In the present work, using biochemistry, molecular biology, and electron microscopy techniques, we found that in the human parasite Leishmania major, TERT (and telomerase activity) shared locations between the nuclear, mitochondrial, and cytoplasmic compartments. Also, some telomerase activity and TERT protein could be found in ∼ 100-nm nanovesicles. In the mitochondrial compartment, TERT appears to be mainly associated with the kinetoplast DNA. When Leishmania cells were exposed to H2O2, TERT changed its relative abundance and activity between the nuclear and mitochondrial compartments, with the majority of activity residing in the mitochondrion. Finally, overexpression of TERT in Leishmania transfected cells not only increased the parasitic cell growth rate but also increased their resistance to oxidative stress.

journal_name

Infect Immun

journal_title

Infection and immunity

authors

Campelo R,Díaz Lozano I,Figarella K,Osuna A,Ramírez JL

doi

10.1128/IAI.02269-14

subject

Has Abstract

pub_date

2015-01-01 00:00:00

pages

57-66

issue

1

eissn

0019-9567

issn

1098-5522

pii

IAI.02269-14

journal_volume

83

pub_type

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