>TIGR03414 ABC_choline_bnd choline ABC transporter, periplasmic binding protein. Partial phylogenetic profiling (PMID:16930487) vs. the genome property of glycine betaine biosynthesis from choline consistently reveals a member of this ABC transporter periplasmic binding protein as the best match, save for the betaine biosynthesis enzymes themselves. Genomes often carry several paralogs, one encoded together with the permease and ATP-binding components and another encoded next to a choline-sulfatase gene, suggesting that different members of this protein family interact with shared components and give some flexibility in substrate. Of two members from Sinorhizobium meliloti 1021, one designated ChoX has been shown experimentally to bind choline (though not various related compounds such as betaine) and to be required for about 60 % of choline uptake. Members of this protein have an invariant Cys residue near the N-terminus and likely are lipoproteins.

Probab=92.00 E-value=0.74 Score=23.20 Aligned_cols=221 Identities=9% Similarity=-0.015 Sum_probs=89.6 Q ss_pred CCCEEEE--EECCCCCCCHHHHHHHHHHHHHHHCCEEEEEECCCHHHHHHHHHHHHCCCCCEEEECCCHHHHHHHHHHHC Q ss_conf 4885999--97887785122338899999988488799997288689997887531266410110133378999887521 Q gi|254780561|r 28 AKPVLTV--YTYNSFVADEGAGPKIKQAFERKCNCELKLIGLSDGVALLNKLRMEGENSAADIVLGFDNNLIDLARKTGL 105 (338) Q Consensus 28 ~~~~l~v--~~~~~~~~~~~~~~~i~~~Fek~~gikV~~~~~~~~~~~~~~~~a~~~~~~~Dv~~~~~~~~~~~~~~~~l 105 (338) T Consensus 6 ~~~~V~i~~~~W~s~~----~~t~v~~~iLE~~GY~Ve~~~~-~~~~~~~~la~GdiDv~~e~W~p~~~~~~~~~~~~g~ 80 (290) T TIGR03414 6 SCKTVRFADVGWTDIT----ATTALASVLLEGLGYQPKVTLL-SVPVTYAGLKDGDLDVFLGNWMPAMEPDIKPYLESGS 80 (290) T ss_pred CCCCEEEEECCCCHHH----HHHHHHHHHHHHCCCCEEEEEC-CHHHHHHHHHCCCCEEEEECCCCCCHHHHHHHHHCCC T ss_conf 0996699606864899----9999999999974996489967-7499999997699707871114785778998863696 Q ss_pred CCCCCCCHHHCCCCCCCCCCCCCCEEEEEEHHHHCCCCCCCCCCCHHHHCCC--CCCCEEEEEECCCCCCHHHHHHHHH- Q ss_conf 2613677000210001243211532431000110011124587645652120--0068289850476530367899998- Q gi|254780561|r 106 FAKSNIDASQLKLPIKWDDDIFVPYDYGYLAFIYDKRQITQPPKNFDELINS--TKPWKIIYQDPRTSTLGLGLLLWIQ- 182 (338) Q Consensus 106 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~y~~~~~~~~p~s~~~l~~~--~~~~~~~~~~~~~~~~~~~~~~~~~- 182 (338) T Consensus 81 v~~lg~~~--------~~a------~~g~~VP~Yv~d---~~l~si~DL~~~~~~f~g~i~gi~~G~~~~~-~~~~~i~~ 142 (290) T TIGR03414 81 VEVLGPNL--------EGA------KYTLAVPTYVAD---AGLKSFADIAKFKDKLDGKIYGIEPGNDGNR-LIQKMIDK 142 (290) T ss_pred EEECCCCC--------CCC------EEEEEECHHHHH---CCCCCHHHHHHCHHHCCCCEECCCCCCCHHH-HHHHHHHH T ss_conf 89835666--------786------378985414776---5999999998586752997613679984778-99999876 Q ss_pred HHCCCCHHHHHHHHHHCCCEEE-CCCH----HHHHHHHCCCCCEEEEECCHHHHHHHHHCCCCEEEEECCCCEEE---EE Q ss_conf 7177313789877762884683-0847----89888622586569995044999998507997378831698088---88 Q gi|254780561|r 183 KIYGDNSAQVWKKIATKTATVT-KGWT----ESYGFFLKGESDFVLSYSTSPGFYLLNYGQDDYVAALFSEGHYL---QI 254 (338) Q Consensus 183 ~~~~~~~~~~~~~~~~~~~~~~-~~~~----~~~~~~~~g~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~eG~~~---~~ 254 (338) T Consensus 143 ~~ygL~~~-----------~l~~~S~aam~a~l~~A~~~~epiv~~~W~Phw~~~-----~~dl~~L~~~~~~~g~~~~~ 206 (290) T TIGR03414 143 NAFGLGGF-----------KLVESSEAGMLAQVARAVKRKEWVVFLGWEPHPMNT-----NFKMTYLTGGDDYFGPNYGG 206 (290) T ss_pred HCCCCCCC-----------EECCCCHHHHHHHHHHHHHCCCCEEEEECCCCHHHH-----HCCEEEECCCCCCCCCCCCH T ss_conf 40798870-----------213688899999999999869998998237754555-----17706705874457899862 Q ss_pred EEEE--EECC--CCCHHHHHHHHHHHCCHHHHHHHHH Q ss_conf 6424--3378--9998999999999639999999885 Q gi|254780561|r 255 EVAA--QLVR--SKQPQLAQEFMQFMISPSFQRILPT 287 (338) Q Consensus 255 ~~~~--i~k~--a~n~~~A~~Fi~flls~e~Q~~~a~ 287 (338) T Consensus 207 ~~v~~~~~~~f~~~~P~~~~~l~~~~~~~~~~~~~~~ 243 (290) T TIGR03414 207 ATVYTNTRKGYAAECPNVGKLLTNLTFTLDMENQIMG 243 (290) T ss_pred HHEEECCCHHHHHHCHHHHHHHHCCCCCHHHHHHHHH T ss_conf 2066414705878793899999615899899999999

HHsearch alignment for GI: 254780561 and conserved domain: TIGR03414