= Andrew Philip Carter
{c}
= A. P. Carter
{c}
{synonym}
\b[Andrew Philip Carter] contributed to structural explanations of bacterial <translation initiation>. His own MRC-hosted curriculum vitae directly links that full name to the 2001 paper credited to A. P. Carter, which determined a complex of <bacterial initiation factor IF1> and the <30S ribosomal subunit>.<Curriculum vitae of Andrew Philip Carter>[Page1, full name; page9, publication54]{ref}
The <X-ray crystallography> structure showed IF1 occupying the <ribosomal A site>. It also revealed displacement of bases A1492 and A1493 of <16S ribosomal RNA>, along with changes extending beyond the immediate binding region. A localized <protein> interaction can therefore influence the conformation of a much larger <RNA>–<protein> assembly.<Crystal structure of an initiation factor bound to the 30S ribosomal subunit by A. P. Carter and others>[Abstract, A-site occlusion and long-range conformational changes; associated structure PDB1HR0]{ref}
For an original occupancy example, imagine 100 otherwise identical snapshots in a model where IF1 and a second ligand cannot occupy the same A-site region. If IF1 occupies that region in 70 snapshots, at most 30 permit that other ligand's simultaneous occupancy. This geometric exclusion does not imply that 70 percent of <biological translation> is prevented: productive initiation places the <initiator transfer RNA> at the distinct <ribosomal P site>, and the actual pathway includes further steps. Site identity matters more than a generic statement that a factor blocks RNA binding.
The structural result supplies a concrete physical mechanism to compare with functional assays. Binding location, conformational rearrangement and eventual <protein> synthesis remain different observations.
\Image[https://www2.mrc-lmb.cam.ac.uk/groups/cartera/wp-content/uploads/sites/25/carter_andrew_2022_sep_O127400-1024x682.jpg]
{title=Andrew Carter, named portrait on the MRC Carter Laboratory People page}
{height=300}
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