>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=94.80 E-value=0.07 Score=32.81 Aligned_cols=186 Identities=15% Similarity=0.143 Sum_probs=108.6 Q ss_pred CCCEEEEEEEEEEECCCCCHHHHHHHHHHHHC-----CCCCC-CCCCC--CCCCEEEEECCCCCCCCCCCC--CCCCCCC Q ss_conf 36314423767750462051223565553101-----23321-10124--686056642142112331222--2333210 Q gi|254780875|r 55 LGWRDFYNVRLTLSSDTFEPRPETELLVDSAL-----AFSLP-RIEKR--DVVRILDLGTGTGAVCLALLK--ESPFFKG 124 (264) Q Consensus 55 lg~~~F~~~~f~v~~~vLIPRpeTE~lv~~~l-----~~~~~-~~~~~--~~~~vLDlG~GsG~i~i~la~--~~~~~~v 124 (264) T Consensus 29 ~~~~~~~~~~v~~s~~~iG~tP--EyL~G~y~~q~aSSmiPp~aL~p~Gn~~~~vlD~AAaPGgKTT~is~~m~N~G-~i 105 (284) T TIGR00446 29 TCEEGFFIEEVKESPLSIGSTP--EYLLGYYYVQEASSMIPPLALEPEGNEKERVLDMAAAPGGKTTQISALMKNEG-AI 105 (284) T ss_pred CCCCCEEEEEEECCCCCCCCCH--HHHHHHHHHHHHHHCCCCEEECCCCCCCCEEEEEECCCCCHHHHHHHHHCCCC-EE T ss_conf 0027427765402677646516--78853789987873676030177876888799974088964899999865885-18 Q ss_pred CCCCCCCCCHHHHHHCCCCCCCCCCCCCCCCCCCCC--CCCH----HHHHHHCCHHHHHHCCCCCCCCCCCCCCCCCCCC Q ss_conf 013332220024442011000122222222222222--2100----2333201133321001221111123575433210 Q gi|254780875|r 125 VGVDISCKALEIAKSNAVTNGVSERFDTLQSDWFSS--VEGL----FDVIVSNPPYIESVIVDCLGLEVRDFDPRISLDG 198 (264) Q Consensus 125 ~~~Dis~~al~~A~~N~~~~~~~~~i~~~~~d~~~~--~~~~----fD~IvsNPPYI~~~~~~~l~~~v~~~EP~~AL~g 198 (264) T Consensus 106 ~Ane~~ksR~k~L~~NI~R~G~~n-~~v~~~DgR~f~~~~~~~eifFD~iLLDAPCSG~GvI~KD~~~~~~~~~eD~~-- 182 (284) T TIGR00446 106 VANEVSKSRTKVLIANINRMGVLN-VAVINVDGRKFGAVVLKMEIFFDRILLDAPCSGEGVIRKDPSRKKNRSEEDIL-- 182 (284) T ss_pred EEECCCCCCCHHHHHHHHHHHHEE-EEEEECCCCHHHHHHCCCEEEEEEEEECCCCCCCCEEEECHHHHCCCCHHHHH-- T ss_conf 997376341066786555621003-33241376300123144303432145257879883376572331147724577-- Q ss_pred CCCCC-CCHHHHHHHHHHHCCC----CCEEEE---EECCCHHHHHHHHHHHCCCCEEEE Q ss_conf 11232-1025689999985378----878999---817667999999999789805899 Q gi|254780875|r 199 GIDGL-SHYRTIADGVSRHLNK----DGLCSV---EIGYNQKVDVVRIFESRKLFLVNA 249 (264) Q Consensus 199 g~dGl-~~~~~ii~~~~~~L~~----~G~l~l---Eig~~q~~~v~~ll~~~gf~~v~~ 249 (264) T Consensus 183 ---~~s~lQkeL~~~A~d~lk~nskhGGv~VYSTCsl~~eENE~V~dy~L~~r~~v~e~ 238 (284) T TIGR00446 183 ---EISKLQKELILAAFDALKPNSKHGGVLVYSTCSLEVEENEEVVDYLLRKRPDVVEE 238 (284) T ss_pred ---HHHHHHHHHHHHHHHHCCCCCCCCCEEEEECCCCCCCCCHHHHHHHHCCCCCEEEE T ss_conf ---64676799999998750445666888898503277122748999986179970775

HHsearch alignment for GI: 254780875 and conserved domain: TIGR00446