# OC Root 2nd 3rd 4th 5th PC Gene/Definition OC.452169 Bacteria.284124 Actinobacteria.232318 Rubrobacter.1718 - rxy.945 rxy:Rxyl_0892 dimethyladenosine transferase; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452169 Bacteria.284124 Actinobacteria.232318 Rubrobacter.1718 - rrd.833 rrd:RradSPS_0784 ksgA: dimethyladenosine transferase; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452170 Bacteria.284149 Planctomycetes.2470 - - rba.1482 rba:RB12377 ksgA; dimethyladenosine transferase; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452170 Bacteria.284149 Planctomycetes.2470 Pirellula.4266 - pir.4112 pir:VN12_22265 rsmA; Ribosomal RNA small subunit methyltransferase A; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452170 Bacteria.284149 Planctomycetes.2470 Pirellula.7046 - psl.2542 psl:Psta_2598 dimethyladenosine transferase; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452170 Bacteria.284149 Planctomycetes.2470 - - plm.3415 plm:Plim_3509 dimethyladenosine transferase; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452170 Bacteria.284149 Planctomycetes.2470 - - pbs.2257 pbs:Plabr_2330 dimethyladenosine transferase; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452170 Bacteria.284149 Planctomycetes.2470 Planctomyces.5134 - plh.4823 plh:VT85_24930 rsmA; Ribosomal RNA small subunit methyltransferase A; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452170 Bacteria.284149 Planctomycetes.2470 Planctomyces.5803 - pls.668 pls:VT03_02245 rsmA_1; Ribosomal RNA small subunit methyltransferase A; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452170 Bacteria.284149 Planctomycetes.2470 - - fmr.3960 fmr:Fuma_04202 rsmA; Ribosomal RNA small subunit methyltransferase A; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452170 Bacteria.284149 Planctomycetes.2470 - - ttf.2487 ttf:THTE_2529 SSU rRNA (adenine(1518)-N(6)/adenine(1519)-N(6))-dimethyltransferase; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452170 Bacteria.284149 Planctomycetes.2470 Gemmata.2280 - ges.4024 ges:VT84_21460 rsmA; Ribosomal RNA small subunit methyltransferase A; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452170 Bacteria.284149 Planctomycetes.2470 Gemmata.2280 - gog.3865 gog:C1280_22305 rsmA; ribosomal RNA small subunit methyltransferase A; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452170 Bacteria.284149 Planctomycetes.2470 - - ipa.1564 ipa:Isop_1579 dimethyladenosine transferase; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452170 Bacteria.284149 Planctomycetes.2470 - - saci.6602 saci:Sinac_7560 dimethyladenosine transferase; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452170 Bacteria.284149 Planctomycetes.2470 - - pbor.3219 pbor:BSF38_03414 rsmA_2; Ribosomal RNA small subunit methyltransferase A; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452170 Bacteria.284149 Planctomycetes.2471 - - pbu.331 pbu:L21SP3_00314 rsmA; Ribosomal RNA small subunit methyltransferase A; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452170 Bacteria.284149 Planctomycetes.2472 - - pbp.87 pbp:STSP1_00014 rsmA; Ribosomal RNA small subunit methyltransferase A; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452170 Bacteria.284149 Planctomycetes.2473 - - pbas.1507 pbas:SMSP2_01639 rsmA; Ribosomal RNA small subunit methyltransferase A; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452170 Bacteria.284149 Planctomycetes.31847 - - kst.2440 kst:KSMBR1_2729 ksgA; hypothetical protein; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452170 Bacteria.284149 Planctomycetes.38196 - - phm.1993 phm:PSMK_20510 rsmA; ribosomal RNA small subunit methyltransferase A; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452171 Bacteria.1246340 Spirochaetes.38172 - - tpx.2482 tpx:Turpa_2588 ribosomal RNA adenine methylase transferase; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452172 Eukaryotes.399146 Protists.85231 Alveolates.30214 Apicomplexans.15280 beq.607 beq:BEWA_002770 signal peptide-containing protein OC.452173 Bacteria.284112 - - - wwe.620 wwe:P147_WWE3C01G0665 hypothetical protein; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452174 Bacteria.284111 Tenericutes.5811 Mycoplasma.4441 Mycoplasma_haemofelis.442 mha.1524 mha:HF1_15420 rsmA; rRNA small subunit methyltransferase A; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452174 Bacteria.284111 Tenericutes.5811 Mycoplasma.4441 Mycoplasma_haemofelis.442 mhf.1502 mhf:MHF_1613 rsmA; ribosomal RNA adenine dimethylase family protein; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452174 Bacteria.284111 Tenericutes.5811 Mycoplasma.4441 Mycoplasma_suis.503 mss.794 mss:MSU_0882 ksgA; dimethyladenosine transferase; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452174 Bacteria.284111 Tenericutes.5811 Mycoplasma.4441 Mycoplasma_suis.503 msk.779 msk:MSUIS_08080 rsmA; Ribosomal RNA small subunit methyltransferase A; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452174 Bacteria.284111 Tenericutes.5811 Mycoplasma.4441 - mwe.455 mwe:WEN_03410 ksgA; 16S ribosomal RNA methyltransferase KsgA/Dim1 family protein; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452174 Bacteria.284111 Tenericutes.5811 Mycoplasma.4441 - mhl.531 mhl:MHLP_04610 ksgA; 16S ribosomal RNA methyltransferase KsgA/Dim1 family protein; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452174 Bacteria.284111 Tenericutes.5811 Mycoplasma.4441 - mhb.421 mhb:MHM_05440 rsmA; dimethyladenosine transferase; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452174 Bacteria.284111 Tenericutes.5811 Mycoplasma.4441 - mpv.487 mpv:PRV_03090 hypothetical protein; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452174 Bacteria.284111 Tenericutes.5811 Mycoplasma.4441 - mov.604 mov:OVS_04455 rRNA methyltransferase; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452174 Bacteria.284111 Tenericutes.5811 Mycoplasma.4442 - mhe.1042 mhe:MHC_05830 ksgA; Ribosomal RNA small subunit methyltransferase A; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452175 Bacteria.284154 Actinobacteria.39307 Tropheryma.113 - twh.205 twh:TWT_203 ksgA; dimethyladenosine transferase; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452175 Bacteria.284154 Actinobacteria.39307 Tropheryma.113 - tws.544 tws:TW569 ksgA; dimethyladenosine transferase; K02528 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase [EC:2.1.1.182] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtu.1980 mtu:Rv1988 erm(37); 23S rRNA (adenine(2058)-N(6))-methyltransferase Erm(37); K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtv.2027 mtv:RVBD_1988 23S rRNA methyltransferase Erm; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtc.2095 mtc:MT2042 rRNA adenine N-6-methyltransferase, putative; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mra.2032 mra:MRA_2001 putative rRNA adenine N-6-methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtf.1999 mtf:TBFG_12019 hypothetical methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtb.1959 mtb:TBMG_02000 methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtk.2001 mtk:TBSG_02011 methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtz.1946 mtz:TBXG_001984 methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtg.1859 mtg:MRGA327_12240 putative methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mti.1840 mti:MRGA423_12355 putative methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mte.1829 mte:CCDC5079_1836 methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtur.2079 mtur:CFBS_2095 putative rRNA adenine N-6-methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtl.1801 mtl:CCDC5180_1811 methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mto.1982 mto:MTCTRI2_2021 methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtd.1920 mtd:UDA_1988 unnamed protein product; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtn.2152 mtn:ERDMAN_2189 methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtj.2068 mtj:J112_10605 Putative methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtub.2010 mtub:MT7199_2017 putative METHYLTRANSFERASE; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtuc.1976 mtuc:J113_13695 Putative methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtue.2048 mtue:J114_10620 Putative methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtx.1987 mtx:M943_10315 methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtuh.1840 mtuh:I917_14015 Putative methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtul.1882 mtul:TBHG_01945 23S rRNA methyltransferase Erm; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtut.2075 mtut:HKBT1_2091 putative rRNA adenine N-6-methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtuu.2075 mtuu:HKBT2_2093 putative rRNA adenine N-6-methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mtq.2082 mtq:HKBS1_2096 putative rRNA adenine N-6-methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mbo.2017 mbo:BQ2027_MB2010 erm(37); probable 23s rrna methyltransferase erm(37); K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mbb.2006 mbb:BCG_2004 Probable methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mbt.2001 mbt:JTY_1999 methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mbm.2002 mbm:BCGMEX_1986 putative methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mbk.2093 mbk:K60_020580 methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mbx.1796 mbx:BCGT_1798 hypothetical protein; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 maf.1943 maf:MAF_19990 putative methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_tuberculosis.1238 mmic.2190 mmic:RN08_2199 23S rRNA methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_canettii.1113 mce.1965 mce:MCAN_20081 putative methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_canettii.1113 mcq.2404 mcq:BN44_40271 Putative methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacterium.8868 Mycobacterium_canettii.1113 mcz.2422 mcz:BN45_50265 Putative methyltransferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacteroides.495 Mycobacteroides_abscessus.1421 mab.2272 mab:MAB_2297 23S rRNA (adenine(2058)-N(6))-methyltransferase Erm(41); K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacteroides.495 Mycobacteroides_abscessus.1421 may.2246 may:LA62_11690 - OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacteroides.495 Mycobacteroides_abscessus.1421 mabo.2239 mabo:NF82_11485 - OC.452176 Bacteria.284079 Actinobacteria.38029 Mycobacteroides.495 Mycobacteroides_abscessus.1421 maz.2231 maz:LA61_11580 - OC.452176 Bacteria.284079 Actinobacteria.38029 - - bcv.1904 bcv:Bcav_1923 ribosomal RNA adenine methylase transferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 Cellulosimicrobium.3596 - cceu.2277 cceu:CBR64_12025 hypothetical protein; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 - - kfl.5721 kfl:Kfla_5998 ribosomal RNA adenine methylase transferase; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38029 - - psim.823 psim:KR76_04810 hypothetical protein; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38030 - - svi.2737 svi:Svir_28640 dimethyladenosine transferase (rRNA methylation); K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38030 Amycolatopsis.20858 - aab.4012 aab:A4R43_20630 hypothetical protein; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38030 Amycolatopsis.26097 - amq.5555 amq:AMETH_5559 ermE; dimethyladenosine transferase (rRNA methylation); K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38030 - - kphy.2519 kphy:AOZ06_12370 hypothetical protein; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184] OC.452176 Bacteria.284079 Actinobacteria.38030 - - pmad.4759 pmad:BAY61_24475 hypothetical protein; K00561 23S rRNA (adenine-N6)-dimethyltransferase [EC:2.1.1.184]