Amino acid dipepetide frequency for Clostridium tetani (strain Massachusetts / E88)

Apart from single amino acid frequencies one can also calculate so called amino acid dipeptide frequency.

There is 400 possibilites (441 if we consider Xaa as additional 21st amino acid representing all non-standard or unknown amino acids). Thus, if the dipeptides would be present randomly in proteins each amino acid dipeptide should be present with 0.25% frequency. As it is not the case in the nature, for better visablity all more than expected dipepetides are marked by red, and those which are underrepresented are marked by blue in the table.

All values are presented as per milles (‰), therefore need to be multiplied by 10-3.

For more information see sequence space article on Wikipedia.

AlaCysAspGluPheGlyHisIleLysLeuMetAsnProGlnArgSerThrValTrpTyrXaa
Ala
3.362AlaAla: 3.362 ± 0.082
0.654AlaCys: 0.654 ± 0.031
2.302AlaAsp: 2.302 ± 0.055
3.101AlaGlu: 3.101 ± 0.082
2.521AlaPhe: 2.521 ± 0.07
3.448AlaGly: 3.448 ± 0.087
0.756AlaHis: 0.756 ± 0.031
5.654AlaIle: 5.654 ± 0.094
4.659AlaLys: 4.659 ± 0.086
5.692AlaLeu: 5.692 ± 0.103
1.601AlaMet: 1.601 ± 0.048
2.439AlaAsn: 2.439 ± 0.056
1.357AlaPro: 1.357 ± 0.041
1.236AlaGln: 1.236 ± 0.038
1.663AlaArg: 1.663 ± 0.044
3.206AlaSer: 3.206 ± 0.071
2.69AlaThr: 2.69 ± 0.063
3.603AlaVal: 3.603 ± 0.071
0.3AlaTrp: 0.3 ± 0.02
2.044AlaTyr: 2.044 ± 0.047
0.0AlaXaa: 0.0 ± 0.0
Cys
0.545CysAla: 0.545 ± 0.026
0.169CysCys: 0.169 ± 0.014
0.561CysAsp: 0.561 ± 0.025
0.771CysGlu: 0.771 ± 0.028
0.491CysPhe: 0.491 ± 0.023
0.98CysGly: 0.98 ± 0.038
0.193CysHis: 0.193 ± 0.015
1.221CysIle: 1.221 ± 0.043
1.079CysLys: 1.079 ± 0.038
0.78CysLeu: 0.78 ± 0.036
0.276CysMet: 0.276 ± 0.022
0.775CysAsn: 0.775 ± 0.032
0.447CysPro: 0.447 ± 0.03
0.224CysGln: 0.224 ± 0.015
0.367CysArg: 0.367 ± 0.023
0.759CysSer: 0.759 ± 0.032
0.556CysThr: 0.556 ± 0.031
0.608CysVal: 0.608 ± 0.025
0.046CysTrp: 0.046 ± 0.007
0.43CysTyr: 0.43 ± 0.024
0.0CysXaa: 0.0 ± 0.0
Asp
2.485AspAla: 2.485 ± 0.061
0.547AspCys: 0.547 ± 0.028
2.21AspAsp: 2.21 ± 0.061
4.29AspGlu: 4.29 ± 0.086
2.807AspPhe: 2.807 ± 0.063
3.021AspGly: 3.021 ± 0.076
0.576AspHis: 0.576 ± 0.029
6.725AspIle: 6.725 ± 0.105
6.181AspLys: 6.181 ± 0.103
4.856AspLeu: 4.856 ± 0.082
1.458AspMet: 1.458 ± 0.04
3.304AspAsn: 3.304 ± 0.078
1.232AspPro: 1.232 ± 0.043
0.672AspGln: 0.672 ± 0.032
1.818AspArg: 1.818 ± 0.048
2.806AspSer: 2.806 ± 0.065
2.506AspThr: 2.506 ± 0.055
3.431AspVal: 3.431 ± 0.074
0.353AspTrp: 0.353 ± 0.021
2.616AspTyr: 2.616 ± 0.06
0.0AspXaa: 0.0 ± 0.0
Glu
3.785GluAla: 3.785 ± 0.082
0.707GluCys: 0.707 ± 0.029
4.993GluAsp: 4.993 ± 0.088
7.911GluGlu: 7.911 ± 0.133
3.049GluPhe: 3.049 ± 0.062
4.386GluGly: 4.386 ± 0.083
0.913GluHis: 0.913 ± 0.034
7.466GluIle: 7.466 ± 0.119
8.677GluLys: 8.677 ± 0.134
6.604GluLeu: 6.604 ± 0.107
1.834GluMet: 1.834 ± 0.048
5.724GluAsn: 5.724 ± 0.1
1.396GluPro: 1.396 ± 0.044
1.663GluGln: 1.663 ± 0.05
2.522GluArg: 2.522 ± 0.067
3.41GluSer: 3.41 ± 0.068
2.931GluThr: 2.931 ± 0.063
4.957GluVal: 4.957 ± 0.077
0.392GluTrp: 0.392 ± 0.023
3.116GluTyr: 3.116 ± 0.07
0.0GluXaa: 0.0 ± 0.0
Phe
2.155PheAla: 2.155 ± 0.058
0.52PheCys: 0.52 ± 0.026
2.197PheAsp: 2.197 ± 0.055
2.581PheGlu: 2.581 ± 0.057
2.011PhePhe: 2.011 ± 0.051
2.637PheGly: 2.637 ± 0.064
0.621PheHis: 0.621 ± 0.027
5.115PheIle: 5.115 ± 0.097
4.401PheLys: 4.401 ± 0.08
4.122PheLeu: 4.122 ± 0.09
1.179PheMet: 1.179 ± 0.039
3.089PheAsn: 3.089 ± 0.076
1.216PhePro: 1.216 ± 0.045
1.103PheGln: 1.103 ± 0.04
1.255PheArg: 1.255 ± 0.039
3.137PheSer: 3.137 ± 0.067
2.217PheThr: 2.217 ± 0.059
2.346PheVal: 2.346 ± 0.062
0.309PheTrp: 0.309 ± 0.019
1.923PheTyr: 1.923 ± 0.052
0.0PheXaa: 0.0 ± 0.0
Gly
3.886GlyAla: 3.886 ± 0.085
0.799GlyCys: 0.799 ± 0.034
3.153GlyAsp: 3.153 ± 0.07
4.727GlyGlu: 4.727 ± 0.08
3.033GlyPhe: 3.033 ± 0.064
4.306GlyGly: 4.306 ± 0.102
0.965GlyHis: 0.965 ± 0.041
6.775GlyIle: 6.775 ± 0.104
5.948GlyLys: 5.948 ± 0.089
5.181GlyLeu: 5.181 ± 0.087
1.71GlyMet: 1.71 ± 0.051
3.413GlyAsn: 3.413 ± 0.075
1.197GlyPro: 1.197 ± 0.047
1.397GlyGln: 1.397 ± 0.045
2.256GlyArg: 2.256 ± 0.051
3.453GlySer: 3.453 ± 0.067
3.279GlyThr: 3.279 ± 0.072
4.347GlyVal: 4.347 ± 0.083
0.449GlyTrp: 0.449 ± 0.028
2.895GlyTyr: 2.895 ± 0.063
0.0GlyXaa: 0.0 ± 0.0
His
0.617HisAla: 0.617 ± 0.028
0.195HisCys: 0.195 ± 0.018
0.65HisAsp: 0.65 ± 0.028
0.803HisGlu: 0.803 ± 0.032
0.626HisPhe: 0.626 ± 0.029
0.961HisGly: 0.961 ± 0.035
0.282HisHis: 0.282 ± 0.021
1.427HisIle: 1.427 ± 0.04
1.171HisLys: 1.171 ± 0.039
1.106HisLeu: 1.106 ± 0.041
0.389HisMet: 0.389 ± 0.023
0.891HisAsn: 0.891 ± 0.033
0.586HisPro: 0.586 ± 0.028
0.292HisGln: 0.292 ± 0.021
0.497HisArg: 0.497 ± 0.025
0.902HisSer: 0.902 ± 0.039
0.633HisThr: 0.633 ± 0.027
0.741HisVal: 0.741 ± 0.033
0.107HisTrp: 0.107 ± 0.012
0.545HisTyr: 0.545 ± 0.025
0.0HisXaa: 0.0 ± 0.0
Ile
5.609IleAla: 5.609 ± 0.11
1.32IleCys: 1.32 ± 0.046
5.81IleAsp: 5.81 ± 0.095
7.677IleGlu: 7.677 ± 0.123
4.526IlePhe: 4.526 ± 0.1
6.278IleGly: 6.278 ± 0.112
1.328IleHis: 1.328 ± 0.047
10.339IleIle: 10.339 ± 0.152
10.449IleLys: 10.449 ± 0.126
9.946IleLeu: 9.946 ± 0.149
2.673IleMet: 2.673 ± 0.062
6.886IleAsn: 6.886 ± 0.114
3.478IlePro: 3.478 ± 0.068
2.203IleGln: 2.203 ± 0.051
3.128IleArg: 3.128 ± 0.069
7.274IleSer: 7.274 ± 0.11
4.92IleThr: 4.92 ± 0.071
6.214IleVal: 6.214 ± 0.085
0.542IleTrp: 0.542 ± 0.026
3.964IleTyr: 3.964 ± 0.071
0.0IleXaa: 0.0 ± 0.0
Lys
4.752LysAla: 4.752 ± 0.096
0.853LysCys: 0.853 ± 0.032
7.232LysAsp: 7.232 ± 0.124
10.385LysGlu: 10.385 ± 0.139
3.562LysPhe: 3.562 ± 0.065
6.028LysGly: 6.028 ± 0.104
1.197LysHis: 1.197 ± 0.035
9.253LysIle: 9.253 ± 0.111
9.535LysLys: 9.535 ± 0.147
8.105LysLeu: 8.105 ± 0.105
2.453LysMet: 2.453 ± 0.054
7.668LysAsn: 7.668 ± 0.118
2.267LysPro: 2.267 ± 0.062
1.923LysGln: 1.923 ± 0.053
3.229LysArg: 3.229 ± 0.074
5.592LysSer: 5.592 ± 0.098
4.184LysThr: 4.184 ± 0.065
6.42LysVal: 6.42 ± 0.109
0.613LysTrp: 0.613 ± 0.029
4.37LysTyr: 4.37 ± 0.087
0.0LysXaa: 0.0 ± 0.0
Leu
4.939LeuAla: 4.939 ± 0.092
1.091LeuCys: 1.091 ± 0.033
5.011LeuAsp: 5.011 ± 0.095
6.623LeuGlu: 6.623 ± 0.106
3.535LeuPhe: 3.535 ± 0.078
6.052LeuGly: 6.052 ± 0.1
1.096LeuHis: 1.096 ± 0.036
8.684LeuIle: 8.684 ± 0.121
9.589LeuLys: 9.589 ± 0.119
7.602LeuLeu: 7.602 ± 0.117
2.376LeuMet: 2.376 ± 0.053
6.306LeuAsn: 6.306 ± 0.098
2.706LeuPro: 2.706 ± 0.061
2.088LeuGln: 2.088 ± 0.047
2.962LeuArg: 2.962 ± 0.064
6.509LeuSer: 6.509 ± 0.109
4.143LeuThr: 4.143 ± 0.078
4.984LeuVal: 4.984 ± 0.074
0.505LeuTrp: 0.505 ± 0.028
3.262LeuTyr: 3.262 ± 0.076
0.0LeuXaa: 0.0 ± 0.0
Met
1.708MetAla: 1.708 ± 0.05
0.277MetCys: 0.277 ± 0.02
1.615MetAsp: 1.615 ± 0.044
2.056MetGlu: 2.056 ± 0.052
1.086MetPhe: 1.086 ± 0.039
1.856MetGly: 1.856 ± 0.049
0.339MetHis: 0.339 ± 0.026
2.16MetIle: 2.16 ± 0.053
2.595MetLys: 2.595 ± 0.055
2.222MetLeu: 2.222 ± 0.054
0.638MetMet: 0.638 ± 0.033
1.647MetAsn: 1.647 ± 0.042
0.814MetPro: 0.814 ± 0.034
0.608MetGln: 0.608 ± 0.027
0.834MetArg: 0.834 ± 0.03
1.649MetSer: 1.649 ± 0.042
1.176MetThr: 1.176 ± 0.042
1.638MetVal: 1.638 ± 0.045
0.158MetTrp: 0.158 ± 0.012
0.99MetTyr: 0.99 ± 0.036
0.0MetXaa: 0.0 ± 0.0
Asn
2.813AsnAla: 2.813 ± 0.056
0.696AsnCys: 0.696 ± 0.033
2.603AsnAsp: 2.603 ± 0.06
4.205AsnGlu: 4.205 ± 0.074
2.857AsnPhe: 2.857 ± 0.063
3.448AsnGly: 3.448 ± 0.067
0.817AsnHis: 0.817 ± 0.029
8.365AsnIle: 8.365 ± 0.117
7.483AsnLys: 7.483 ± 0.129
6.28AsnLeu: 6.28 ± 0.106
1.763AsnMet: 1.763 ± 0.048
4.766AsnAsn: 4.766 ± 0.097
2.139AsnPro: 2.139 ± 0.056
1.133AsnGln: 1.133 ± 0.035
2.115AsnArg: 2.115 ± 0.058
4.15AsnSer: 4.15 ± 0.08
2.947AsnThr: 2.947 ± 0.065
3.629AsnVal: 3.629 ± 0.067
0.495AsnTrp: 0.495 ± 0.029
2.847AsnTyr: 2.847 ± 0.067
0.0AsnXaa: 0.0 ± 0.0
Pro
1.281ProAla: 1.281 ± 0.043
0.325ProCys: 0.325 ± 0.022
1.279ProAsp: 1.279 ± 0.046
2.102ProGlu: 2.102 ± 0.054
1.409ProPhe: 1.409 ± 0.046
1.771ProGly: 1.771 ± 0.055
0.493ProHis: 0.493 ± 0.026
2.913ProIle: 2.913 ± 0.072
2.398ProLys: 2.398 ± 0.053
2.535ProLeu: 2.535 ± 0.064
0.687ProMet: 0.687 ± 0.029
1.575ProAsn: 1.575 ± 0.043
0.608ProPro: 0.608 ± 0.029
0.73ProGln: 0.73 ± 0.034
0.798ProArg: 0.798 ± 0.031
1.759ProSer: 1.759 ± 0.042
1.448ProThr: 1.448 ± 0.04
1.872ProVal: 1.872 ± 0.051
0.229ProTrp: 0.229 ± 0.018
1.245ProTyr: 1.245 ± 0.039
0.0ProXaa: 0.0 ± 0.0
Gln
1.149GlnAla: 1.149 ± 0.042
0.284GlnCys: 0.284 ± 0.017
1.17GlnAsp: 1.17 ± 0.035
1.546GlnGlu: 1.546 ± 0.048
0.901GlnPhe: 0.901 ± 0.034
1.476GlnGly: 1.476 ± 0.041
0.31GlnHis: 0.31 ± 0.021
2.026GlnIle: 2.026 ± 0.045
1.988GlnLys: 1.988 ± 0.051
1.924GlnLeu: 1.924 ± 0.051
0.575GlnMet: 0.575 ± 0.022
1.415GlnAsn: 1.415 ± 0.04
0.567GlnPro: 0.567 ± 0.031
0.614GlnGln: 0.614 ± 0.036
0.928GlnArg: 0.928 ± 0.038
1.215GlnSer: 1.215 ± 0.04
0.901GlnThr: 0.901 ± 0.034
1.321GlnVal: 1.321 ± 0.039
0.206GlnTrp: 0.206 ± 0.017
0.945GlnTyr: 0.945 ± 0.033
0.0GlnXaa: 0.0 ± 0.0
Arg
1.748ArgAla: 1.748 ± 0.049
0.357ArgCys: 0.357 ± 0.021
1.957ArgAsp: 1.957 ± 0.049
3.052ArgGlu: 3.052 ± 0.054
1.4ArgPhe: 1.4 ± 0.045
2.013ArgGly: 2.013 ± 0.06
0.445ArgHis: 0.445 ± 0.025
3.13ArgIle: 3.13 ± 0.066
3.116ArgLys: 3.116 ± 0.062
2.768ArgLeu: 2.768 ± 0.061
0.877ArgMet: 0.877 ± 0.032
2.037ArgAsn: 2.037 ± 0.051
0.798ArgPro: 0.798 ± 0.034
0.854ArgGln: 0.854 ± 0.036
1.478ArgArg: 1.478 ± 0.054
1.543ArgSer: 1.543 ± 0.05
1.449ArgThr: 1.449 ± 0.042
2.135ArgVal: 2.135 ± 0.058
0.255ArgTrp: 0.255 ± 0.02
1.443ArgTyr: 1.443 ± 0.048
0.0ArgXaa: 0.0 ± 0.0
Ser
2.965SerAla: 2.965 ± 0.061
0.701SerCys: 0.701 ± 0.028
2.731SerAsp: 2.731 ± 0.072
3.735SerGlu: 3.735 ± 0.072
3.18SerPhe: 3.18 ± 0.072
4.003SerGly: 4.003 ± 0.067
0.848SerHis: 0.848 ± 0.034
7.269SerIle: 7.269 ± 0.112
6.149SerLys: 6.149 ± 0.101
5.865SerLeu: 5.865 ± 0.098
1.64SerMet: 1.64 ± 0.049
3.88SerAsn: 3.88 ± 0.08
1.631SerPro: 1.631 ± 0.042
1.515SerGln: 1.515 ± 0.048
2.005SerArg: 2.005 ± 0.051
4.237SerSer: 4.237 ± 0.077
2.944SerThr: 2.944 ± 0.061
3.465SerVal: 3.465 ± 0.07
0.384SerTrp: 0.384 ± 0.022
2.487SerTyr: 2.487 ± 0.06
0.0SerXaa: 0.0 ± 0.0
Thr
2.747ThrAla: 2.747 ± 0.062
0.478ThrCys: 0.478 ± 0.025
2.124ThrAsp: 2.124 ± 0.05
2.878ThrGlu: 2.878 ± 0.072
2.083ThrPhe: 2.083 ± 0.055
3.458ThrGly: 3.458 ± 0.07
0.725ThrHis: 0.725 ± 0.033
5.032ThrIle: 5.032 ± 0.08
3.792ThrLys: 3.792 ± 0.072
4.709ThrLeu: 4.709 ± 0.079
1.155ThrMet: 1.155 ± 0.041
2.634ThrAsn: 2.634 ± 0.054
1.742ThrPro: 1.742 ± 0.048
1.013ThrGln: 1.013 ± 0.037
1.412ThrArg: 1.412 ± 0.049
2.962ThrSer: 2.962 ± 0.064
2.532ThrThr: 2.532 ± 0.071
3.096ThrVal: 3.096 ± 0.068
0.347ThrTrp: 0.347 ± 0.021
1.814ThrTyr: 1.814 ± 0.051
0.0ThrXaa: 0.0 ± 0.0
Val
3.619ValAla: 3.619 ± 0.084
0.703ValCys: 0.703 ± 0.035
3.707ValAsp: 3.707 ± 0.077
4.646ValGlu: 4.646 ± 0.072
2.796ValPhe: 2.796 ± 0.061
4.05ValGly: 4.05 ± 0.085
0.825ValHis: 0.825 ± 0.031
5.985ValIle: 5.985 ± 0.098
5.619ValLys: 5.619 ± 0.093
5.58ValLeu: 5.58 ± 0.083
1.495ValMet: 1.495 ± 0.047
3.626ValAsn: 3.626 ± 0.065
1.934ValPro: 1.934 ± 0.057
1.334ValGln: 1.334 ± 0.037
1.818ValArg: 1.818 ± 0.051
3.955ValSer: 3.955 ± 0.075
3.043ValThr: 3.043 ± 0.067
4.237ValVal: 4.237 ± 0.081
0.378ValTrp: 0.378 ± 0.023
2.304ValTyr: 2.304 ± 0.054
0.0ValXaa: 0.0 ± 0.0
Trp
0.306TrpAla: 0.306 ± 0.022
0.091TrpCys: 0.091 ± 0.011
0.363TrpAsp: 0.363 ± 0.024
0.424TrpGlu: 0.424 ± 0.024
0.282TrpPhe: 0.282 ± 0.017
0.451TrpGly: 0.451 ± 0.025
0.111TrpHis: 0.111 ± 0.013
0.688TrpIle: 0.688 ± 0.031
0.557TrpLys: 0.557 ± 0.028
0.514TrpLeu: 0.514 ± 0.024
0.217TrpMet: 0.217 ± 0.016
0.467TrpAsn: 0.467 ± 0.029
0.142TrpPro: 0.142 ± 0.013
0.194TrpGln: 0.194 ± 0.017
0.256TrpArg: 0.256 ± 0.019
0.389TrpSer: 0.389 ± 0.025
0.295TrpThr: 0.295 ± 0.022
0.351TrpVal: 0.351 ± 0.023
0.08TrpTrp: 0.08 ± 0.011
0.242TrpTyr: 0.242 ± 0.019
0.0TrpXaa: 0.0 ± 0.0
Tyr
1.818TyrAla: 1.818 ± 0.046
0.508TyrCys: 0.508 ± 0.021
2.226TyrAsp: 2.226 ± 0.053
2.926TyrGlu: 2.926 ± 0.067
1.979TyrPhe: 1.979 ± 0.053
2.545TyrGly: 2.545 ± 0.051
0.581TyrHis: 0.581 ± 0.026
4.336TyrIle: 4.336 ± 0.084
4.232TyrLys: 4.232 ± 0.086
3.672TyrLeu: 3.672 ± 0.072
1.069TyrMet: 1.069 ± 0.04
3.01TyrAsn: 3.01 ± 0.069
1.201TyrPro: 1.201 ± 0.042
0.665TyrGln: 0.665 ± 0.025
1.515TyrArg: 1.515 ± 0.042
2.726TyrSer: 2.726 ± 0.059
1.941TyrThr: 1.941 ± 0.054
2.26TyrVal: 2.26 ± 0.052
0.273TyrTrp: 0.273 ± 0.02
1.827TyrTyr: 1.827 ± 0.056
0.0TyrXaa: 0.0 ± 0.0
Xaa
0.0XaaAla: 0.0 ± 0.0
0.0XaaCys: 0.0 ± 0.0
0.0XaaAsp: 0.0 ± 0.0
0.0XaaGlu: 0.0 ± 0.0
0.0XaaPhe: 0.0 ± 0.0
0.0XaaGly: 0.0 ± 0.0
0.0XaaHis: 0.0 ± 0.0
0.0XaaIle: 0.0 ± 0.0
0.0XaaLys: 0.0 ± 0.0
0.0XaaLeu: 0.0 ± 0.0
0.0XaaMet: 0.0 ± 0.0
0.0XaaAsn: 0.0 ± 0.0
0.0XaaPro: 0.0 ± 0.0
0.0XaaGln: 0.0 ± 0.0
0.0XaaArg: 0.0 ± 0.0
0.0XaaSer: 0.0 ± 0.0
0.0XaaThr: 0.0 ± 0.0
0.0XaaVal: 0.0 ± 0.0
0.0XaaTrp: 0.0 ± 0.0
0.0XaaTyr: 0.0 ± 0.0
0.0XaaXaa: 0.0 ± 0.0
Statistics based on 2415 proteins (809352 amino acids)

Note: The error has been estimated with the bootstraping (x100) at the protein level

Above dipeptide statistics (among other stats for this proteome) you can download from this CSV file
See this proteome in: uniprot_link
Proteome-pI is available under Creative Commons Attribution-NoDerivs license, for more details see here

Reference: Kozlowski LP. Proteome-pI 2.0: Proteome Isoelectric Point Database Update. Nucleic Acids Res. 2021, doi: 10.1093/nar/gkab944 Contact: Lukasz P. Kozlowski