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Supplementary information, available at the NATURE Web page

By Andrea Elliott,2014-09-04 04:32
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Supplementary information, available at the NATURE Web pageSupp

    1 Supplementary Information

Table 1 Coordinations of chlorophylls and their interactions with local

    environments

    Hydrogen bond Chlorophylls in Central Hydrogen bond partner partner to Chlorophylls the pea LHC-II of Chlb C7-formyl ligands chlorophyll model (ref.1)1C13-keto group Chlb 601 Tyr 24 ; - - none Chla 602 a4 (Glu 65) Glu 65 - Tyr 44 N, Trp 46 N Chla 603 a5 (His 68) His 68 - Wat

    Chla 604 a6 (Gly 78) Wat 309 - Leu 113 N

    Chlb 605 Val 119 ; Gln 122 N, Ser 123 N - none

    Wat 308 Chlb 606 b6 (Gln 131) Wat 310 - (ligand of Chlb 607)

    Chlb 607 a7 (unidentified) Wat 308 Gln 131 NE2 -

    Chlb 608 b1 (unidentified) Wat 302 Leu 148 N Arg 70 NH1

    Chlb 609 b5 (Glu 139) Glu 139 Gln 131 NE2 His 68 ND1

    Chla 610 a1 (Glu 180) Glu 180 - Gly 158 N

    Phospho-diChla 611 b2 (unidentified) - - ester

    Chla 612 a2 (Asn 183) Asn 183 - -

    Chla 613 a3 (Gln 197) Gln 197 - -

    Chla 614 b3 (His 212) His 212 - -

    ; These residues contribute their backbone carbonyls to coordinate with the central

    magnesium of chlorophylls.

    2

     Characters in parentheses indicate the chlorophyll central ligands identified in previous model.

    Table 2 Interaction between chlorophylls with strong excitonic coupling

    -1Chlorophyll pairs Excitonic coupling V (cm) Cos R (Å) R (Å) center