TY - JOUR
T1 - APOBEC3 inhibits DEAD-END function to regulate microRNA activity
AU - Ali, Sara
AU - Karki, Namrata
AU - Bhattacharya, Chitralekha
AU - Zhu, Rui
AU - MacDuff, Donna A.
AU - Stenglein, Mark D.
AU - Schumacher, April J.
AU - Demorest, Zachary L.
AU - Harris, Reuben S.
AU - Matin, Angabin
AU - Aggarwal, Sita
N1 - Funding Information:
This project was funded by Texas ARP. We thank Q. Wang, M. Zhang, K. Luo, and G. Seawood for technical assistance. We thank R. Agami for the generous gift of the luciferase and mirVec constructs. We thank R. Harris for the human APOBEC3G-myc construct and M.S. Neuberger and C. Rada for Apobec3−/− mice.
PY - 2013/7/26
Y1 - 2013/7/26
N2 - The RNA binding protein DEAD-END (DND1) is one of the few proteins known to regulate microRNA (miRNA) activity at the level of miRNA-mRNA interaction. DND1 blocks miRNA interaction with the 3′-untranslated region (3′-UTR) of specific mRNAs and restores protein expression. Previously, we showed that the DNA cytosine deaminase, APOBEC3 (apolipoprotein B mRNA-editing enzyme, catalytic polypeptide like 3), interacts with DND1. APOBEC3 has been primarily studied for its role in restricting and inactivating retroviruses and retroelements. In this report, we examine the significance of DND1-APOBEC3 interaction. We found that while human DND1 inhibits miRNA-mediated inhibition of P27, human APOBEC3G is able to counteract this repression and restore miRNA activity. APOBEC3G, by itself, does not affect the 3′-UTR of P27. We found that APOBEC3G also blocks DND1 function to restore miR-372 and miR-206 inhibition through the 3′-UTRs of LATS2 and CX43, respectively. In corollary experiments, we tested whether DND1 affects the viral restriction function or mutator activity of APOBEC3. We found that DND1 does not affect APOBEC3 inhibition of infectivity of exogenous retrovirus HIV (ΔVif) or retrotransposition of MusD. In addition, examination of Ter/Ter;Apobec3-/- mice, lead us to conclude that DND1 does not regulate the mutator activity of APOBEC3 in germ cells. In summary, our results show that APOBEC3 is able to modulate DND1 function to regulate miRNA mediated translational regulation in cells but DND1 does not affect known APOBEC3 function.
AB - The RNA binding protein DEAD-END (DND1) is one of the few proteins known to regulate microRNA (miRNA) activity at the level of miRNA-mRNA interaction. DND1 blocks miRNA interaction with the 3′-untranslated region (3′-UTR) of specific mRNAs and restores protein expression. Previously, we showed that the DNA cytosine deaminase, APOBEC3 (apolipoprotein B mRNA-editing enzyme, catalytic polypeptide like 3), interacts with DND1. APOBEC3 has been primarily studied for its role in restricting and inactivating retroviruses and retroelements. In this report, we examine the significance of DND1-APOBEC3 interaction. We found that while human DND1 inhibits miRNA-mediated inhibition of P27, human APOBEC3G is able to counteract this repression and restore miRNA activity. APOBEC3G, by itself, does not affect the 3′-UTR of P27. We found that APOBEC3G also blocks DND1 function to restore miR-372 and miR-206 inhibition through the 3′-UTRs of LATS2 and CX43, respectively. In corollary experiments, we tested whether DND1 affects the viral restriction function or mutator activity of APOBEC3. We found that DND1 does not affect APOBEC3 inhibition of infectivity of exogenous retrovirus HIV (ΔVif) or retrotransposition of MusD. In addition, examination of Ter/Ter;Apobec3-/- mice, lead us to conclude that DND1 does not regulate the mutator activity of APOBEC3 in germ cells. In summary, our results show that APOBEC3 is able to modulate DND1 function to regulate miRNA mediated translational regulation in cells but DND1 does not affect known APOBEC3 function.
KW - APOBEC3
KW - APOBEC3G
KW - DND1
KW - P27
KW - microRNA
UR - http://www.scopus.com/inward/record.url?scp=84880863074&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84880863074&partnerID=8YFLogxK
U2 - 10.1186/1471-2199-14-16
DO - 10.1186/1471-2199-14-16
M3 - Article
C2 - 23890083
AN - SCOPUS:84880863074
SN - 1471-2199
VL - 14
JO - BMC Molecular Biology
JF - BMC Molecular Biology
M1 - 16
ER -