>TIGR00446 nop2p NOL1/NOP2/sun family putative RNA methylase; InterPro: IPR011023 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 , . .

Probab=95.75 E-value=0.029 Score=33.97 Aligned_cols=143 Identities=18% Similarity=0.222 Sum_probs=95.2 Q ss_pred CCCEEEEECCCCCHHHHHHHHCC---CEEEEECCCHHHHHHHHHHHHHCCCCCEEEEECCHHHHHHHHHHCCCCCCCCCC Q ss_conf 88338860246423588885068---569984475889999999788608996499976899998988623322223210 Q gi|254781000|r 209 IQGDLLELYCGNGNFSLVLARHF---DRVLAVEIAKPSVEAARYNIAANHVNNVKIVRMSSKEFTQAMRREREFNRLKDI 285 (371) Q Consensus 209 ~~~~vlDLycG~G~fsl~La~~~---~~V~gvE~~~~ai~~A~~Na~~N~i~n~~f~~~~a~~~~~~~~~~~~~~~~~~~ 285 (371) T Consensus 77 ~~~~vlD~AAaPGgKTT~is~~m~N~G~i~Ane~~ksR~k~L~~NI~R~G~~n~~v~~~DgR~f~~~~~~~e-------- 148 (284) T TIGR00446 77 EKERVLDMAAAPGGKTTQISALMKNEGAIVANEVSKSRTKVLIANINRMGVLNVAVINVDGRKFGAVVLKME-------- 148 (284) T ss_pred CCCEEEEEECCCCCHHHHHHHHHCCCCEEEEECCCCCCCHHHHHHHHHHHHEEEEEEECCCCHHHHHHCCCE-------- T ss_conf 888799974088964899999865885189973763410667865556210033324137630012314430-------- Q ss_pred HHCCCCCCEEEECCCCCCHH------------------------HHHHHH-HH--CC--C---CEEEEECCH-------- Q ss_conf 10147877999869702634------------------------899999-85--39--9---489992998-------- Q gi|254781000|r 286 DIHSYRFKTIFVDPPRSGLD------------------------DATVGM-VQ--AY--P---HILYISCNP-------- 325 (371) Q Consensus 286 ~~~~~~~d~vilDPPR~G~~------------------------~~~~~~-~~--~~--~---~ivYVSCnp-------- 325 (371) T Consensus 149 ----ifFD~iLLDAPCSG~GvI~KD~~~~~~~~~eD~~~~s~lQkeL~~~A~d~lk~nskhGGv~VYSTCsl~~eENE~V 224 (284) T TIGR00446 149 ----IFFDRILLDAPCSGEGVIRKDPSRKKNRSEEDILEISKLQKELILAAFDALKPNSKHGGVLVYSTCSLEVEENEEV 224 (284) T ss_pred ----EEEEEEEECCCCCCCCEEEECHHHHCCCCHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCEEEEECCCCCCCCCHHH T ss_conf ----3432145257879883376572331147724577646767999999987504456668888985032771227489 Q ss_pred ---HHHHHHHHH-----HCC-----------CCEEEEEEEEECCCCCCCEEE--EEEEE Q ss_conf ---999886998-----426-----------967999999717989872489--99999 Q gi|254781000|r 326 ---DSLCRDLSI-----LST-----------THTIERLALFDQFPYTRHMEC--GVLLV 363 (371) Q Consensus 326 ---~TlarD~~~-----l~~-----------gy~i~~~~~~D~FP~T~HvE~--v~~l~ 363 (371) T Consensus 225 ~dy~L~~r~~v~e~~~~~~~G~E~~~~~~~k~y~~~v~~~lR~~P~~~~~~GFFVAklR 283 (284) T TIGR00446 225 VDYLLRKRPDVVEEVNLLVKGDEAFTANKGKEYSEEVKKALRVFPQSYDCEGFFVAKLR 283 (284) T ss_pred HHHHHCCCCCEEEEECCCHHCCCCCCCCCCCCCCHHHHHHCCCCCCCCCCCCEEEEEEC T ss_conf 99986179970775233000011346654210020021000028788897701775412

HHsearch alignment for GI: 254781000 and conserved domain: TIGR00446