>pfam03059 NAS Nicotianamine synthase protein. Nicotianamine synthase EC:2.5.1.43 catalyses the trimerisation of S-adenosylmethionine to yield one molecule of nicotianamine. Nicotianamine has an important role in plant iron uptake mechanisms. Plants adopt two strategies (termed I and II) of iron acquisition. Strategy I is adopted by all higher plants except graminaceous plants, which adopt strategy II. In strategy I plants, the role of nicotianamine is not fully determined: possible roles include the formation of more stable complexes with ferrous than with ferric ion, which might serve as a sensor of the physiological status of iron within a plant, or which might be involved in the transport of iron. In strategy II (graminaceous) plants, nicotianamine is the key intermediate (and nicotianamine synthase the key enzyme) in the synthesis of the mugineic family (the only known family in plants) of phytosiderophores. Phytosiderophores are iron chelators whose secretion by the roots is great

Probab=97.77 E-value=3.5e-05 Score=54.55 Aligned_cols=140 Identities=19% Similarity=0.200 Sum_probs=87.8 Q ss_pred CCCEEEEECCCCCCCCC---CC-CCCCCCCCCCCCCCCCCHHHHHHCCCCCC-CCCCCCCCCCCCCCCCC--CHHHHHHH Q ss_conf 86056642142112331---22-22333210013332220024442011000-12222222222222221--00233320 Q gi|254780875|r 98 VVRILDLGTGTGAVCLA---LL-KESPFFKGVGVDISCKALEIAKSNAVTNG-VSERFDTLQSDWFSSVE--GLFDVIVS 170 (264) Q Consensus 98 ~~~vLDlG~GsG~i~i~---la-~~~~~~~v~~~Dis~~al~~A~~N~~~~~-~~~~i~~~~~d~~~~~~--~~fD~Ivs 170 (264) T Consensus 122 p~~vAFI--GSGPLPLTsivLa~~h~~~~~~~niD~d~~A~~~A~~lv~~~g~ls~~m~f~t~d~~~~~~~l~~~DvV~- 198 (277) T pfam03059 122 PSRIAFI--GSGPLPLTSIVLASYHLPDTSFDNYDIDGLANDRASKLVSSDPDLSSRMSFHTADVLDVTTELKAYDVVF- 198 (277) T ss_pred CCEEEEE--CCCCCCHHHHHHHHHCCCCCEEECCCCCHHHHHHHHHHHHHCCCHHCCEEEEECCCCCCCCCCCCCCEEE- T ss_conf 7448996--3788613899998850887314331278899999999998655300472899526444444445476898- Q ss_pred CCHHHHHHCCCCCCCCCCCCCCCCCCCCCCCCCCCHHHHHHHHHHHCCCCCEEEEE--ECCCHH-HHHHHHHHHCCCCEE Q ss_conf 11333210012211111235754332101123210256899999853788789998--176679-999999997898058 Q gi|254780875|r 171 NPPYIESVIVDCLGLEVRDFDPRISLDGGIDGLSHYRTIADGVSRHLNKDGLCSVE--IGYNQK-VDVVRIFESRKLFLV 247 (264) Q Consensus 171 NPPYI~~~~~~~l~~~v~~~EP~~AL~gg~dGl~~~~~ii~~~~~~L~~~G~l~lE--ig~~q~-~~v~~ll~~~gf~~v 247 (264) T Consensus 199 ----l------------------AALVGm~~--e~K~~I~~hL~k~m~~Ga~l~~Rsa~GlR~~LYp~vd~~~~~GFe~l 254 (277) T pfam03059 199 ----L------------------AALVGMDK--EEKAKVIDHLGKHMAPGALLVLRSAHGARAFLYPVVDPCDLRGFEVL 254 (277) T ss_pred ----E------------------HHHCCCCH--HHHHHHHHHHHHHCCCCCEEEEECCHHHHHHCCCCCCHHHCCCCEEE T ss_conf ----7------------------21135433--35999999999745899679996112178762887896673870799 Q ss_pred EEEECCCC-CCEEEEEEC Q ss_conf 99805689-975999979 Q gi|254780875|r 248 NAFKDYGG-NDRVLLFCR 264 (264) Q Consensus 248 ~~~kD~~g-~~R~vi~~r 264 (264) T Consensus 255 ~~~hP~~~ViNSvI~~rk 272 (277) T pfam03059 255 SVYHPTDEVINSVIVARK 272 (277) T ss_pred EEECCCCCCEEEEEEEEC T ss_conf 998899984113899833

HHsearch alignment for GI: 254780875 and conserved domain: pfam03059