1996
DOI: 10.1074/jbc.271.49.31135
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Modified Ligands to FA and FB in Photosystem I

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Cited by 31 publications
(15 citation statements)
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“…Based on this, we suggested that Trp 18 may be the critical residue [13]. Another study affinity-labeled a C3-1ike exoenzyme from Clostridium limosum with [carbonyl-J4C]NAD by UV irradiation and suggested that the Glu ~73 residue of the C3 exoenzyme was a part of the NAD binding site of the catalytic center [14].…”
mentioning
confidence: 99%
“…Based on this, we suggested that Trp 18 may be the critical residue [13]. Another study affinity-labeled a C3-1ike exoenzyme from Clostridium limosum with [carbonyl-J4C]NAD by UV irradiation and suggested that the Glu ~73 residue of the C3 exoenzyme was a part of the NAD binding site of the catalytic center [14].…”
mentioning
confidence: 99%
“…Studies of unbound mutant PSI-C proteins show that the EPR resonances of F A and F B are virtually indistinguishable in terms of g values and line widths (36). When the mutant PSI-C proteins are bound to PS I, the F A and F B resonances narrow and become differentiated with respect to their principal g values (42,43). Thus, the final determinants of the g tensors of F A and F B may be ultimately related to protein:protein interactions with PSI-A/B and PSI-D (41).…”
Section: Discussionmentioning
confidence: 99%
“…As shown in Table I, electron transfer to F A /F B in the serine and aspartate mutants roughly correlates with the rates of ferredoxin-mediated NADP ϩ photoreduction. Comparison of some of these mutants (C14S PsaC , C51S PsaC ) with analogous in vitro PS I mutants (36) indicates that F A /F B photoreduction in the in vivo mutants samples occurs with a lower apparent quantum efficiency. One possible explanation is that the external thiolate of ␤-mercaptoethanol, used in the iron-sulfur insertion protocol, provides the ligand to the [4Fe-4S] cluster.…”
Section: Discussionmentioning
confidence: 99%
“…PCC 6803. Cysteines 14 and 51 were changed to alanine (C14A PsaC , C51A PsaC ), aspartic acid (C14D PsaC , C51D PsaC ), and serine (C14S PsaC , C51S PsaC ), and the results were compared with in vitro reconstitution studies (3,4,36). In each instance, the PsaC mutant strains could not grow under standard photoautotrophic growth conditions, but could grow mixotrophically under weak light, indicating a light-sensitive lesion in PS I that had become limiting for growth.…”
Section: Discussionmentioning
confidence: 99%