| Type: | Domain | Name: | Nop2p |
| Description: | This domain is found in archaeal, bacterial and eukaryotic proteins. In the archaea and bacteria, they are primarily restricted to the euryarchaeota and proteobacteria respectively; where they are either described as either nucleolar protein or tRNA/rRNA cytosine-C5-methylase. They all have the S-adenosyl methionine (SAM) binding domain and are related to bacterial Fmu (16S rRNA m5C 967 methyltransferase) where the structure of the methyl transferase domain has been determined []. In the eukaryota, the majority are annotated as being 'nucleolar protein'. None of the eukaryotic members in this family have a the SAM binding signature. Despite this, the yeast Nop2p is a probable RNA m(5)C methyltransferase, essential for processing and maturation of 27S pre-rRNA and large ribosomal subunit biogenesis []; localised to the nucleolus and is essential for viability []. Reduced Nop2p expression limits yeast growth and decreases levels of mature 60S ribosomal subunits while altering rRNA processing []. There is substantial identity between Nop2p and human p120 (NOL1), which is also called the proliferation-associated nucleolar antigen [, ]. | Short Name: | Nop2p |
| DB identifier | Type | Name |
|---|---|---|
| IPR018314 | Conserved_site | Bacterial Fmu (Sun)/eukaryotic nucleolar NOL1/Nop2p, conserved site |
| GO Term | Gene Name |
|---|---|
| GO:0003723 | IPR011023 |
| GO:0008757 | IPR011023 |
| GO:0006364 | IPR011023 |
| DB identifier | Type | Name |
|---|---|---|
| IPR001678 | Domain | SAM-dependent methyltransferase RsmB/NOP2-type |
