adenosine deaminases acting on RNA (ADARs) are enzymes that convert adenosines to inosines in double-stranded RNAs (RNA editing A-to-I). ADAR1 and ADAR2 were previously reported as HIV-1 proviral factors. the aim of this study was to investigate the composition of the ADAR2 ribonucleoprotein complex during HIV-1 expression. by using a dual-tag affinity purification procedure in cells expressing HIV-1 followed by mass spectrometry analysis, we identified 10 non-ribosomal ADAR2-interacting factors. a significant fraction of these proteins was previously found associated to the long INterspersed Element 1 (LINE1 or L1) ribonucleoparticles and to regulate the life cycle of L1 retrotransposons. considering that we previously demonstrated that ADAR1 is an inhibitor of LINE-1 retrotransposon activity, we investigated whether also ADAR2 played a similar function. to reach this goal, we performed specific cell culture retrotransposition assays in cells overexpressing or ablated for ADAR2. these experiments unveil a novel function of ADAR2 as suppressor of L1 retrotransposition. furthermore, we showed that ADAR2 binds the basal L1 RNP complex. overall, these data support the role of ADAR2 as regulator of L1 life cycle.

Frassinelli, L., Orecchini, E., Al-Wardat, S., Tripodi, M., Mancone, C., Doria, M., et al. (2021). The RNA editing enzyme ADAR2 restricts L1 mobility. RNA BIOLOGY, 18(1 suppl.), 75-87 [10.1080/15476286.2021.1940020].

The RNA editing enzyme ADAR2 restricts L1 mobility

Frassinelli, L;Orecchini, E;Galardi, S;Ciafre, SA;Michienzi, A
2021-10-15

Abstract

adenosine deaminases acting on RNA (ADARs) are enzymes that convert adenosines to inosines in double-stranded RNAs (RNA editing A-to-I). ADAR1 and ADAR2 were previously reported as HIV-1 proviral factors. the aim of this study was to investigate the composition of the ADAR2 ribonucleoprotein complex during HIV-1 expression. by using a dual-tag affinity purification procedure in cells expressing HIV-1 followed by mass spectrometry analysis, we identified 10 non-ribosomal ADAR2-interacting factors. a significant fraction of these proteins was previously found associated to the long INterspersed Element 1 (LINE1 or L1) ribonucleoparticles and to regulate the life cycle of L1 retrotransposons. considering that we previously demonstrated that ADAR1 is an inhibitor of LINE-1 retrotransposon activity, we investigated whether also ADAR2 played a similar function. to reach this goal, we performed specific cell culture retrotransposition assays in cells overexpressing or ablated for ADAR2. these experiments unveil a novel function of ADAR2 as suppressor of L1 retrotransposition. furthermore, we showed that ADAR2 binds the basal L1 RNP complex. overall, these data support the role of ADAR2 as regulator of L1 life cycle.
15-ott-2021
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore BIO/13
Settore BIO/11
English
Con Impact Factor ISI
ADAR2
LINE-1
RNA editing
double-stranded RNA (dsRNA)
retrotransposons
Frassinelli, L., Orecchini, E., Al-Wardat, S., Tripodi, M., Mancone, C., Doria, M., et al. (2021). The RNA editing enzyme ADAR2 restricts L1 mobility. RNA BIOLOGY, 18(1 suppl.), 75-87 [10.1080/15476286.2021.1940020].
Frassinelli, L; Orecchini, E; Al-Wardat, S; Tripodi, M; Mancone, C; Doria, M; Galardi, S; Ciafre, S; Michienzi, A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/355223
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