The telomeric protein AKTIP interacts with A- and B-type lamins and is involved in regulation of cellular senescence.

Abstract:

:AKTIP is a shelterin-interacting protein required for replication of telomeric DNA. Here, we show that AKTIP biochemically interacts with A- and B-type lamins and affects lamin A, but not lamin C or B, expression. In interphase cells, AKTIP localizes at the nuclear rim and in discrete regions of the nucleoplasm just like lamins. Double immunostaining revealed that AKTIP partially co-localizes with lamin B1 and lamin A/C in interphase cells, and that proper AKTIP localization requires functional lamin A. In mitotic cells, AKTIP is enriched at the spindle poles and at the midbody of late telophase cells similar to lamin B1. AKTIP-depleted cells show senescence-associated markers and recapitulate several aspects of the progeroid phenotype. Collectively, our results indicate that AKTIP is a new player in lamin-related processes, including those that govern nuclear architecture, telomere homeostasis and cellular senescence.

journal_name

Open Biol

journal_title

Open biology

authors

Burla R,Carcuro M,Torre ML,Fratini F,Crescenzi M,D'Apice MR,Spitalieri P,Raffa GD,Astrologo L,Lattanzi G,Cundari E,Raimondo D,Biroccio A,Gatti M,Saggio I

doi

10.1098/rsob.160103

subject

Has Abstract

pub_date

2016-08-01 00:00:00

issue

8

issn

2046-2441

pii

rsob.160103

journal_volume

6

pub_type

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