Secondary structure and type of interaction of amino acid residues of avidin in different subunit interfaces | Residue in avidin | Differences found in other proteins | ||||
---|---|---|---|---|---|---|
Secondary | M-chain | S-chain | Â | BBP-A | BBP-B | AVRsa |
1–4 interface | ||||||
β4 | H-bonds |  | H50 | Kb | Rc | L |
β4 | H-bond |  | Q53 | - | - | - |
β4 |  | H-bonds | N54 | Qd | Qd | H |
B4 | H-bond | H-bond | T55 | Pb | Qb | gap |
L4 | Â | H-bond | N57 | Td | Sd | K |
L4 | Â | H-bonds | R59 | Gb | Vb | A |
β5 | H-bond |  | G65 | - | Ad | - |
β5 | H-bond | H-bond | T67 | - | - | - |
β5 |  | H-bonds | N69 | Qe | Wf | L/H |
L5 | H-bonds | Â | W70 | - | - | - |
L5 | Â | H-bond | K71 | Qd | Db | N |
L5 | H-bonds | Â | S73 | Ad | - | - |
β6 |  | H-phobic | V78 | - | Ad | - |
β6 | H-bond |  | T80 | Vf | Af | V |
β6 |  | H-bonds | Q82 | - | - | - |
β7 | H-bond |  | M96 | Ab | Tb | K |
β7 |  | H-phobic | L98 | - | Md | - |
β7 |  | H-bond | R100 | - | - | - |
β7 | H-bond |  | S101 | Eg | Eg | L |
L7 | H-bond | Â | V103 | - | - | - |
β8 |  | H-bonds | T113 | - | - | - |
1–2 interface | ||||||
L7 | Â | H-phobic | W110 | - | - | - |
B8 | H-bond | Â | T113 | - | - | - |
B8 | H-bond | Â | V115 | - | - | - |
1–3 interface | ||||||
B7 | H-bond | H-phobic | M96 | A | Tb | K |
B8 | Â | H-phobic | V115 | - | - | - |
B8 | Â | H-phobic | I117 | T | Rh | N/Y |