The RNA-binding protein MARTA2 regulates dendritic targeting of MAP2 mRNAs in rat neurons
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The RNA-binding protein MARTA2 regulates dendritic targeting of MAP2 mRNAs in rat neurons. / Zivraj, Krishna H; Rehbein, Monika; Ölschläger-Schütt, Janin; Schob, Claudia; Falley, Katrin; Buck, Friedrich; Schweizer, Michaela; Schepis, Antonino; Kremmer, Elisabeth; Richter, Dietmar; Kreienkamp, Hans-Jürgen; Kindler, Stefan.
In: J NEUROCHEM, Vol. 124, No. 5, 01.03.2013, p. 670-84.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - The RNA-binding protein MARTA2 regulates dendritic targeting of MAP2 mRNAs in rat neurons
AU - Zivraj, Krishna H
AU - Rehbein, Monika
AU - Ölschläger-Schütt, Janin
AU - Schob, Claudia
AU - Falley, Katrin
AU - Buck, Friedrich
AU - Schweizer, Michaela
AU - Schepis, Antonino
AU - Kremmer, Elisabeth
AU - Richter, Dietmar
AU - Kreienkamp, Hans-Jürgen
AU - Kindler, Stefan
N1 - © 2012 International Society for Neurochemistry.
PY - 2013/3/1
Y1 - 2013/3/1
N2 - Dendritic targeting of mRNAs encoding the microtubule-associated protein 2 (MAP2) in neurons involves a cis-acting dendritic targeting element. Two rat brain proteins, MAP2-RNA trans-acting protein (MARTA)1 and MARTA2, bind to the cis-element with both high affinity and specificity. In this study, affinity-purified MARTA2 was identified as orthologue of human far-upstream element binding protein 3. In neurons, it resides in somatodendritic granules and dendritic spines and associates with MAP2 mRNAs. Expression of a dominant-negative variant of MARTA2 disrupts dendritic targeting of endogenous MAP2 mRNAs, while not noticeably altering the level and subcellular distribution of polyadenylated mRNAs as a whole. Finally, MAP2 transcripts associate with the microtubule-based motor KIF5 and inhibition of KIF5, but not cytoplasmic dynein function disrupts extrasomatic trafficking of MAP2 mRNA granules. Thus, in neurons MARTA2 appears to represent a key trans-acting factor involved in KIF5-mediated dendritic targeting of MAP2 mRNAs.
AB - Dendritic targeting of mRNAs encoding the microtubule-associated protein 2 (MAP2) in neurons involves a cis-acting dendritic targeting element. Two rat brain proteins, MAP2-RNA trans-acting protein (MARTA)1 and MARTA2, bind to the cis-element with both high affinity and specificity. In this study, affinity-purified MARTA2 was identified as orthologue of human far-upstream element binding protein 3. In neurons, it resides in somatodendritic granules and dendritic spines and associates with MAP2 mRNAs. Expression of a dominant-negative variant of MARTA2 disrupts dendritic targeting of endogenous MAP2 mRNAs, while not noticeably altering the level and subcellular distribution of polyadenylated mRNAs as a whole. Finally, MAP2 transcripts associate with the microtubule-based motor KIF5 and inhibition of KIF5, but not cytoplasmic dynein function disrupts extrasomatic trafficking of MAP2 mRNA granules. Thus, in neurons MARTA2 appears to represent a key trans-acting factor involved in KIF5-mediated dendritic targeting of MAP2 mRNAs.
KW - Animals
KW - Blotting, Western
KW - Dendrites
KW - Immunohistochemistry
KW - Immunoprecipitation
KW - In Situ Hybridization
KW - Mass Spectrometry
KW - Microscopy, Immunoelectron
KW - Microtubule-Associated Proteins
KW - Neurons
KW - Protein Transport
KW - RNA, Messenger
KW - RNA-Binding Proteins
KW - Rats
KW - Real-Time Polymerase Chain Reaction
KW - Reverse Transcriptase Polymerase Chain Reaction
U2 - 10.1111/jnc.12079
DO - 10.1111/jnc.12079
M3 - SCORING: Journal article
C2 - 23121659
VL - 124
SP - 670
EP - 684
JO - J NEUROCHEM
JF - J NEUROCHEM
SN - 0022-3042
IS - 5
ER -