FUNCTION: Minor enzyme contributing to the isomerization of uridine to pseudouridine (pseudouridylation) of specific mitochondrial mRNAs (mt-mRNAs) such as COXI and COXIII mt-mRNAs (PubMed:27974379, PubMed:31477916). As a component of a functional protein-RNA module, consisting of RCC1L, NGRN, RPUSD...
                        FUNCTION: Minor enzyme contributing to the isomerization of uridine to pseudouridine (pseudouridylation) of specific mitochondrial mRNAs (mt-mRNAs) such as COXI and COXIII mt-mRNAs (PubMed:27974379, PubMed:31477916). As a component of a functional protein-RNA module, consisting of RCC1L, NGRN, RPUSD3, RPUSD4, TRUB2, FASTKD2 and 16S mitochondrial ribosomal RNA (16S mt-rRNA), controls 16S mt-rRNA abundance and is required for intra-mitochondrial translation (PubMed:27667664). Also catalyzes pseudouridylation of some tRNAs, including synthesis of pseudouridine(55) from uracil-55, in the psi GC loop of a subset of tRNAs (PubMed:33023933). {ECO:0000269|PubMed:27667664, ECO:0000269|PubMed:27974379, ECO:0000269|PubMed:31477916, ECO:0000269|PubMed:33023933}.
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                        GO - Biological processes (BP): 
                        mRNA processing [GO:0006397]; mRNA pseudouridine synthesis [GO:1990481]; positive regulation of mitochondrial translation [GO:0070131]...
                        mRNA processing [GO:0006397]; mRNA pseudouridine synthesis [GO:1990481]; positive regulation of mitochondrial translation [GO:0070131]
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                        GO - Molecular function (MF): 
                        pseudouridine synthase activity [GO:0009982]; RNA binding [GO:0003723]...
                        pseudouridine synthase activity [GO:0009982]; RNA binding [GO:0003723]
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                        GO - Cellular component (CC): 
                        mitochondrial matrix [GO:0005759]; mitochondrion [GO:0005739]; ribonucleoprotein granule [GO:0035770]...
                        mitochondrial matrix [GO:0005759]; mitochondrion [GO:0005739]; ribonucleoprotein granule [GO:0035770]
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