Function:Binds with high affinity to RNA molecules that contain AU-rich elements (AREs) found within the 3'-UTR of many proto-oncogenes and cytokine mRNAs. Also binds to double- and single-stranded DNA sequences in a specific manner and functions a transcription factor. Each of the RNA-binding domains specifically can bind solely to a single-stranded non-monotonous 5'-UUAG-3' sequence and also weaker to the single-stranded 5'-TTAGGG-3' telomeric DNA repeat. Binds RNA oligonucleotides with 5'-UUAGGG-3' repeats more tightly than the telomeric single-stranded DNA 5'-TTAGGG-3' repeats. Binding of RRM1 to DNA inhibits the formation of DNA quadruplex structure which may play a role in telomere elongation. May be involved in translationally coupled mRNA turnover. Implicated with other RNA-binding proteins in the cytoplasmic deadenylation/translational and decay interplay of the FOS mRNA mediated by the major coding-region determinant of instability (mCRD) domain. ,PTM:Arg-345 is dimethylated , probably to asymmetric dimethylarginine. ,sequence Caution:Contaminating sequence. Sequence of unknown origin in the N-terminal part. ,sequence Caution:Several sequence conflicts. ,similarity:Contains 2 RRM (RNA recognition motif) domains. ,subcellular location:Component of ribonucleosomes. ,subunit:Part of a complex associated with the FOS mCRD domain and consisting of PABPC1 , PAIP1 , CSDE1/UNR and SYNCRIP. Interacts with IGF2BP2. ,
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