[Amino-acid sequence which could adopt both right- and left-handed helical structures]


Examining the associated 5-tile code sequences, one could identify local structural motifs immediately.

For example, it is easy to identify amino-acid fragments which could adopt both right- and left-handed helical structures,
where left-handed helical structures corresponds to 5-tile code RR and right-handed helical structures to 5-tile code AQ, or B.


(1) Cluster 11 (From residue 1 to residue 111): coils of two turns

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   Z-Score: 20.0
AR: 110
RMSD: 1.7A
SI: 100%
Left-handed (1dcl A) Right-handed (1dcl B)
DaliLite result

                              ******
1dcA --000003000000RG0000000000RR0R001R00000000RG0000000RO00001RG0QBG000000RG000000R00QABG00000000RO0RG0000R00000R--
Res  PSALTQPPSASGSLGQSVTISCTGTSSNVGGYNYVSWYQQHAGKAPKVIIYEVNKRPSGVPDRFSGSKSGNTASLTVSGLQAEDEADYYCSSYEGSDNFVFGTGTKVTVLG
1dcB --00000R000000RG000000000QB0QAG0RR00000000RG0000R00RO00000R00QBG000000RG000000R00QABRG000000031RR000000000000--
                              ******
5-tile code sequences
DSSP LLLEELLLEEEELLLLLEEEEEEELLLLLlLLLLEEEEEELLLLLLEEEELLLLLLLLLLLLLEEEEELLLEEEEEELLLLHHHLEEEEEEELLLLLLLEELLLEEEEELL
1dcA PSALTQPPSASGSLGQSVTISCTGTSSNVgGYNYVSWYQQHAGKAPKVIIYEVNKRPSGVPDRFSGSKSGNTASLTVSGLQAEDEADYYCSSYEGSDNFVFGTGTKVTVLG
     ||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
1dcB PSALTQPPSASGSLGQSVTISCTGTSSNVgGYNYVSWYQQHAGKAPKVIIYEVNKRPSGVPDRFSGSKSGNTASLTVSGLQAEDEADYYCSSYEGSDNFVFGTGTKVTVLG
DSSP LLEELLLLLLLEELLLEEEEEEELLLLLLlLLLLEEEEEELLLLLEEEEELLLLLLLLLLLLLEEEEELLLEEEEEEELLLLLLLEEEEEEEELLLLLEEEELLLEELEEL

Structural alignment by DaliLite



(2) Cluster 58 (From residue 2 to residue 109): coils of one turn

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   Z-Score: 20.4
AR: 106
RMSD: 1.5A
SI: 97%
Left-handed (1jvk A) Right-handed (1jvk B)
DaliLite result

                           *****
1jvA --0000R000000RG0000001RR00O0000RO00000000RG0000300RR00000RG0QBG000000RG000000R00QABRG000000000ABR00000R000--
Res  TALTQPASVSGSPGQSITVSCTGVSSIVGSYNLVSWYQQHPGKAPKLLTYEVNKRPSGVSDRFSGSKSGNSASLTISGLQAEDEADYYCSSYDGSSTSVVFGGGTKLT
1jvB --G000R000000RG0000001OQABG0RR0RR00000000RG0000001RR00000R00QBG000000RG000000R00QABGG00000000QBBRG0000R000--
                           *****
5-tile code sequences
DSSP LLLLLLLEELLLLLLEEEEEEELL.LLLLllLLLEEEEEELLLLLLEEEELLLLLLLLLLLLLEEEEEELLEEEEEEELLLHHHLEEEEEEELLLLLLLLEELLLEEEL
1jvA TALTQPASVSGSPGQSITVSCTGV.SSIVgsYNLVSWYQQHPGKAPKLLTYEVNKRPSGVSDRFSGSKSGNSASLTISGLQAEDEADYYCSSYDGSSTSVVFGGGTKLT
     |||||||||||||||||||||||| |     ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
1jvB TALTQPASVSGSPGQSITVSCTGVsSIVG.sYNLVSWYQQHPGKAPKLLTYEVNKRPSGVSDRFSGSKSGNSASLTISGLQAEDEADYYCSSYDGSSTSVVFGGGTKLT
DSSP LLLLLLLEELLLLLLLEEEEEELLlLLLL.lLLLEEEEEELLLLLLEEEELLLLLLLLLLLLLEEEEEELLEEEEEELLLLHHHLEEEEEEEEELLLLEEEELLLEEEL

Structural alignment by DaliLite



(3) Cluster 29: coils of one turn

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   Z-Score: 8.8
AR: 53
RMSD: 0.8A
SI: 100%
Left-handed (1k50 A) Right-handed (1k50 B)
DaliLite result

                                                      *******
1k5A --000000000QBR0000000000QAAAAAAAAAAAAAAAAB000000000RRRRG00000--
Res  EEVTIKANLIFANGSTQTAEFKGTFEKATSEAYAYADTLKKDNGEWTADVADKGYTLNIKFAG
1k5B --000000000QBR0000000000QAAAAAAAAAAAAAAAB00000000R30000000000--
                                                      *******
5-tile code sequences
DSSP LLEEEEEEEELLLLLEEEEEEEELHHHHHHHHHHHHHHLHHHHLLEEEEEEHHhleeeeeell
1k5A EEVTIKANLIFANGSTQTAEFKGTFEKATSEAYAYADTLKKDNGEWTADVADKgytlnikfag
     |||||||||||||||||||||||||||||||||||||||||||||||||||||
1k5B EEVTIKANLIFANGSTQTAEFKGTFEKATSEAYAYADTLKKDNGEWTADVADKgytlnikfag
DSSP LLEEEEEEEELLLLLEEEEEEEELHHHHHHHHHHHHHHLHHHHLLLLLLLLLLllllllllll

Structural alignment by DaliLite





[The DSSP code]

[The 5-tile code]