Amino acid dipepetide frequency for Smithella sp. SCADC

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
7.277AlaAla: 7.277 ± 0.129
1.071AlaCys: 1.071 ± 0.045
4.432AlaAsp: 4.432 ± 0.076
4.663AlaGlu: 4.663 ± 0.083
3.166AlaPhe: 3.166 ± 0.074
6.376AlaGly: 6.376 ± 0.125
1.448AlaHis: 1.448 ± 0.047
6.011AlaIle: 6.011 ± 0.093
5.014AlaLys: 5.014 ± 0.082
7.767AlaLeu: 7.767 ± 0.118
2.241AlaMet: 2.241 ± 0.056
2.755AlaAsn: 2.755 ± 0.068
2.33AlaPro: 2.33 ± 0.058
2.749AlaGln: 2.749 ± 0.066
4.113AlaArg: 4.113 ± 0.083
4.194AlaSer: 4.194 ± 0.085
3.577AlaThr: 3.577 ± 0.079
5.7AlaVal: 5.7 ± 0.095
0.705AlaTrp: 0.705 ± 0.033
2.321AlaTyr: 2.321 ± 0.057
0.0AlaXaa: 0.0 ± 0.0
Cys
1.005CysAla: 1.005 ± 0.042
0.201CysCys: 0.201 ± 0.015
0.671CysAsp: 0.671 ± 0.035
0.638CysGlu: 0.638 ± 0.029
0.529CysPhe: 0.529 ± 0.025
1.218CysGly: 1.218 ± 0.048
0.29CysHis: 0.29 ± 0.021
0.699CysIle: 0.699 ± 0.03
0.662CysLys: 0.662 ± 0.031
1.247CysLeu: 1.247 ± 0.041
0.28CysMet: 0.28 ± 0.018
0.458CysAsn: 0.458 ± 0.026
0.69CysPro: 0.69 ± 0.039
0.374CysGln: 0.374 ± 0.024
0.718CysArg: 0.718 ± 0.031
0.83CysSer: 0.83 ± 0.039
0.582CysThr: 0.582 ± 0.033
0.794CysVal: 0.794 ± 0.034
0.116CysTrp: 0.116 ± 0.012
0.403CysTyr: 0.403 ± 0.022
0.0CysXaa: 0.0 ± 0.0
Asp
4.009AspAla: 4.009 ± 0.076
0.632AspCys: 0.632 ± 0.027
2.714AspAsp: 2.714 ± 0.066
3.663AspGlu: 3.663 ± 0.082
2.781AspPhe: 2.781 ± 0.064
3.171AspGly: 3.171 ± 0.063
0.989AspHis: 0.989 ± 0.038
4.89AspIle: 4.89 ± 0.081
3.972AspLys: 3.972 ± 0.08
5.246AspLeu: 5.246 ± 0.095
1.442AspMet: 1.442 ± 0.042
2.176AspAsn: 2.176 ± 0.055
2.082AspPro: 2.082 ± 0.06
1.389AspGln: 1.389 ± 0.043
2.445AspArg: 2.445 ± 0.05
2.804AspSer: 2.804 ± 0.068
2.45AspThr: 2.45 ± 0.064
3.678AspVal: 3.678 ± 0.081
0.628AspTrp: 0.628 ± 0.03
2.308AspTyr: 2.308 ± 0.059
0.0AspXaa: 0.0 ± 0.0
Glu
4.91GluAla: 4.91 ± 0.094
0.564GluCys: 0.564 ± 0.028
2.993GluAsp: 2.993 ± 0.06
4.794GluGlu: 4.794 ± 0.093
2.499GluPhe: 2.499 ± 0.062
3.95GluGly: 3.95 ± 0.072
1.106GluHis: 1.106 ± 0.042
5.769GluIle: 5.769 ± 0.106
6.429GluLys: 6.429 ± 0.108
5.812GluLeu: 5.812 ± 0.101
1.934GluMet: 1.934 ± 0.053
3.371GluAsn: 3.371 ± 0.077
1.916GluPro: 1.916 ± 0.049
2.102GluGln: 2.102 ± 0.062
3.133GluArg: 3.133 ± 0.073
3.176GluSer: 3.176 ± 0.07
3.223GluThr: 3.223 ± 0.067
3.908GluVal: 3.908 ± 0.076
0.589GluTrp: 0.589 ± 0.032
1.993GluTyr: 1.993 ± 0.056
0.0GluXaa: 0.0 ± 0.0
Phe
3.271PheAla: 3.271 ± 0.068
0.724PheCys: 0.724 ± 0.029
2.652PheAsp: 2.652 ± 0.063
2.334PheGlu: 2.334 ± 0.056
2.347PhePhe: 2.347 ± 0.082
3.182PheGly: 3.182 ± 0.078
0.878PheHis: 0.878 ± 0.036
3.532PheIle: 3.532 ± 0.074
2.633PheLys: 2.633 ± 0.058
4.537PheLeu: 4.537 ± 0.09
1.063PheMet: 1.063 ± 0.039
1.931PheAsn: 1.931 ± 0.051
1.767PhePro: 1.767 ± 0.043
1.329PheGln: 1.329 ± 0.041
2.011PheArg: 2.011 ± 0.051
3.18PheSer: 3.18 ± 0.069
2.394PheThr: 2.394 ± 0.05
2.906PheVal: 2.906 ± 0.065
0.531PheTrp: 0.531 ± 0.03
1.718PheTyr: 1.718 ± 0.053
0.0PheXaa: 0.0 ± 0.0
Gly
5.171GlyAla: 5.171 ± 0.097
1.09GlyCys: 1.09 ± 0.049
3.318GlyAsp: 3.318 ± 0.078
4.011GlyGlu: 4.011 ± 0.071
3.303GlyPhe: 3.303 ± 0.075
5.119GlyGly: 5.119 ± 0.115
1.377GlyHis: 1.377 ± 0.045
5.921GlyIle: 5.921 ± 0.104
5.894GlyLys: 5.894 ± 0.101
6.238GlyLeu: 6.238 ± 0.114
2.092GlyMet: 2.092 ± 0.058
3.005GlyAsn: 3.005 ± 0.068
1.778GlyPro: 1.778 ± 0.054
2.05GlyGln: 2.05 ± 0.05
3.46GlyArg: 3.46 ± 0.082
3.975GlySer: 3.975 ± 0.083
3.74GlyThr: 3.74 ± 0.085
4.679GlyVal: 4.679 ± 0.092
0.796GlyTrp: 0.796 ± 0.03
2.505GlyTyr: 2.505 ± 0.058
0.0GlyXaa: 0.0 ± 0.0
His
1.296HisAla: 1.296 ± 0.05
0.329HisCys: 0.329 ± 0.025
0.96HisAsp: 0.96 ± 0.037
0.989HisGlu: 0.989 ± 0.034
1.007HisPhe: 1.007 ± 0.041
1.343HisGly: 1.343 ± 0.049
0.478HisHis: 0.478 ± 0.029
1.348HisIle: 1.348 ± 0.045
1.138HisLys: 1.138 ± 0.042
1.92HisLeu: 1.92 ± 0.053
0.43HisMet: 0.43 ± 0.024
0.748HisAsn: 0.748 ± 0.028
1.134HisPro: 1.134 ± 0.041
0.641HisGln: 0.641 ± 0.027
0.983HisArg: 0.983 ± 0.037
1.038HisSer: 1.038 ± 0.042
0.888HisThr: 0.888 ± 0.032
1.105HisVal: 1.105 ± 0.035
0.223HisTrp: 0.223 ± 0.016
0.714HisTyr: 0.714 ± 0.033
0.0HisXaa: 0.0 ± 0.0
Ile
6.526IleAla: 6.526 ± 0.103
1.026IleCys: 1.026 ± 0.042
4.63IleAsp: 4.63 ± 0.085
5.088IleGlu: 5.088 ± 0.099
3.746IlePhe: 3.746 ± 0.085
5.439IleGly: 5.439 ± 0.097
1.414IleHis: 1.414 ± 0.043
6.856IleIle: 6.856 ± 0.122
6.0IleLys: 6.0 ± 0.1
7.09IleLeu: 7.09 ± 0.094
1.972IleMet: 1.972 ± 0.051
3.843IleAsn: 3.843 ± 0.079
3.413IlePro: 3.413 ± 0.077
2.155IleGln: 2.155 ± 0.049
3.826IleArg: 3.826 ± 0.077
5.396IleSer: 5.396 ± 0.079
4.162IleThr: 4.162 ± 0.081
5.23IleVal: 5.23 ± 0.086
0.647IleTrp: 0.647 ± 0.028
2.531IleTyr: 2.531 ± 0.072
0.0IleXaa: 0.0 ± 0.0
Lys
5.377LysAla: 5.377 ± 0.085
0.653LysCys: 0.653 ± 0.032
4.144LysAsp: 4.144 ± 0.085
5.777LysGlu: 5.777 ± 0.102
2.385LysPhe: 2.385 ± 0.058
4.474LysGly: 4.474 ± 0.084
1.13LysHis: 1.13 ± 0.039
6.877LysIle: 6.877 ± 0.098
7.325LysLys: 7.325 ± 0.144
6.111LysLeu: 6.111 ± 0.098
2.355LysMet: 2.355 ± 0.061
3.995LysAsn: 3.995 ± 0.081
2.644LysPro: 2.644 ± 0.057
2.405LysGln: 2.405 ± 0.056
3.32LysArg: 3.32 ± 0.069
4.158LysSer: 4.158 ± 0.081
4.283LysThr: 4.283 ± 0.074
4.401LysVal: 4.401 ± 0.081
0.701LysTrp: 0.701 ± 0.032
2.555LysTyr: 2.555 ± 0.064
0.0LysXaa: 0.0 ± 0.0
Leu
7.837LeuAla: 7.837 ± 0.118
1.176LeuCys: 1.176 ± 0.04
4.987LeuAsp: 4.987 ± 0.085
5.696LeuGlu: 5.696 ± 0.094
4.204LeuPhe: 4.204 ± 0.084
6.047LeuGly: 6.047 ± 0.106
1.732LeuHis: 1.732 ± 0.052
7.262LeuIle: 7.262 ± 0.106
7.467LeuLys: 7.467 ± 0.094
8.796LeuLeu: 8.796 ± 0.125
2.342LeuMet: 2.342 ± 0.051
4.297LeuAsn: 4.297 ± 0.071
4.319LeuPro: 4.319 ± 0.078
3.124LeuGln: 3.124 ± 0.06
4.786LeuArg: 4.786 ± 0.095
6.383LeuSer: 6.383 ± 0.1
5.03LeuThr: 5.03 ± 0.089
5.287LeuVal: 5.287 ± 0.091
0.866LeuTrp: 0.866 ± 0.039
2.764LeuTyr: 2.764 ± 0.064
0.0LeuXaa: 0.0 ± 0.0
Met
2.476MetAla: 2.476 ± 0.057
0.247MetCys: 0.247 ± 0.019
1.448MetAsp: 1.448 ± 0.045
1.926MetGlu: 1.926 ± 0.053
0.916MetPhe: 0.916 ± 0.033
1.993MetGly: 1.993 ± 0.049
0.462MetHis: 0.462 ± 0.025
2.079MetIle: 2.079 ± 0.063
2.299MetLys: 2.299 ± 0.049
2.372MetLeu: 2.372 ± 0.061
0.717MetMet: 0.717 ± 0.036
1.25MetAsn: 1.25 ± 0.044
1.255MetPro: 1.255 ± 0.045
0.867MetGln: 0.867 ± 0.036
1.295MetArg: 1.295 ± 0.039
1.513MetSer: 1.513 ± 0.051
1.449MetThr: 1.449 ± 0.043
1.669MetVal: 1.669 ± 0.051
0.18MetTrp: 0.18 ± 0.014
0.503MetTyr: 0.503 ± 0.026
0.0MetXaa: 0.0 ± 0.0
Asn
3.018AsnAla: 3.018 ± 0.072
0.519AsnCys: 0.519 ± 0.024
2.142AsnAsp: 2.142 ± 0.063
2.629AsnGlu: 2.629 ± 0.066
1.989AsnPhe: 1.989 ± 0.054
2.592AsnGly: 2.592 ± 0.063
0.829AsnHis: 0.829 ± 0.035
4.137AsnIle: 4.137 ± 0.077
3.238AsnLys: 3.238 ± 0.077
4.455AsnLeu: 4.455 ± 0.074
1.138AsnMet: 1.138 ± 0.039
1.946AsnAsn: 1.946 ± 0.06
2.394AsnPro: 2.394 ± 0.057
1.303AsnGln: 1.303 ± 0.047
2.03AsnArg: 2.03 ± 0.047
2.259AsnSer: 2.259 ± 0.061
1.961AsnThr: 1.961 ± 0.055
2.842AsnVal: 2.842 ± 0.067
0.516AsnTrp: 0.516 ± 0.03
1.684AsnTyr: 1.684 ± 0.055
0.0AsnXaa: 0.0 ± 0.0
Pro
3.379ProAla: 3.379 ± 0.07
0.458ProCys: 0.458 ± 0.024
2.737ProAsp: 2.737 ± 0.065
3.288ProGlu: 3.288 ± 0.077
1.997ProPhe: 1.997 ± 0.058
2.856ProGly: 2.856 ± 0.058
0.748ProHis: 0.748 ± 0.033
2.218ProIle: 2.218 ± 0.057
2.142ProLys: 2.142 ± 0.064
3.858ProLeu: 3.858 ± 0.068
0.877ProMet: 0.877 ± 0.043
1.27ProAsn: 1.27 ± 0.039
1.582ProPro: 1.582 ± 0.055
1.527ProGln: 1.527 ± 0.049
1.657ProArg: 1.657 ± 0.051
2.173ProSer: 2.173 ± 0.061
1.706ProThr: 1.706 ± 0.046
3.334ProVal: 3.334 ± 0.076
0.462ProTrp: 0.462 ± 0.03
1.354ProTyr: 1.354 ± 0.047
0.0ProXaa: 0.0 ± 0.0
Gln
2.499GlnAla: 2.499 ± 0.06
0.335GlnCys: 0.335 ± 0.024
1.418GlnAsp: 1.418 ± 0.045
2.176GlnGlu: 2.176 ± 0.054
1.162GlnPhe: 1.162 ± 0.041
1.964GlnGly: 1.964 ± 0.049
0.544GlnHis: 0.544 ± 0.029
2.568GlnIle: 2.568 ± 0.056
3.005GlnLys: 3.005 ± 0.066
2.774GlnLeu: 2.774 ± 0.071
0.997GlnMet: 0.997 ± 0.034
1.64GlnAsn: 1.64 ± 0.048
1.097GlnPro: 1.097 ± 0.038
1.101GlnGln: 1.101 ± 0.045
1.706GlnArg: 1.706 ± 0.051
1.822GlnSer: 1.822 ± 0.052
1.739GlnThr: 1.739 ± 0.051
1.879GlnVal: 1.879 ± 0.054
0.403GlnTrp: 0.403 ± 0.03
1.026GlnTyr: 1.026 ± 0.04
0.0GlnXaa: 0.0 ± 0.0
Arg
3.158ArgAla: 3.158 ± 0.065
0.55ArgCys: 0.55 ± 0.033
2.631ArgAsp: 2.631 ± 0.061
3.595ArgGlu: 3.595 ± 0.079
2.378ArgPhe: 2.378 ± 0.053
3.051ArgGly: 3.051 ± 0.061
1.039ArgHis: 1.039 ± 0.039
4.017ArgIle: 4.017 ± 0.073
3.786ArgLys: 3.786 ± 0.07
4.752ArgLeu: 4.752 ± 0.073
1.415ArgMet: 1.415 ± 0.045
2.168ArgAsn: 2.168 ± 0.059
1.793ArgPro: 1.793 ± 0.059
1.935ArgGln: 1.935 ± 0.063
2.64ArgArg: 2.64 ± 0.063
2.508ArgSer: 2.508 ± 0.062
2.297ArgThr: 2.297 ± 0.064
2.931ArgVal: 2.931 ± 0.067
0.518ArgTrp: 0.518 ± 0.027
1.711ArgTyr: 1.711 ± 0.05
0.0ArgXaa: 0.0 ± 0.0
Ser
4.524SerAla: 4.524 ± 0.093
0.758SerCys: 0.758 ± 0.032
3.05SerAsp: 3.05 ± 0.075
3.368SerGlu: 3.368 ± 0.074
3.059SerPhe: 3.059 ± 0.062
5.048SerGly: 5.048 ± 0.094
1.192SerHis: 1.192 ± 0.041
4.423SerIle: 4.423 ± 0.07
3.395SerLys: 3.395 ± 0.077
6.145SerLeu: 6.145 ± 0.105
1.587SerMet: 1.587 ± 0.045
2.069SerAsn: 2.069 ± 0.058
2.45SerPro: 2.45 ± 0.056
1.851SerGln: 1.851 ± 0.046
3.008SerArg: 3.008 ± 0.062
3.853SerSer: 3.853 ± 0.084
2.741SerThr: 2.741 ± 0.069
3.82SerVal: 3.82 ± 0.072
0.684SerTrp: 0.684 ± 0.029
1.985SerTyr: 1.985 ± 0.064
0.0SerXaa: 0.0 ± 0.0
Thr
4.196ThrAla: 4.196 ± 0.087
0.564ThrCys: 0.564 ± 0.028
2.646ThrAsp: 2.646 ± 0.064
2.85ThrGlu: 2.85 ± 0.083
2.116ThrPhe: 2.116 ± 0.051
4.685ThrGly: 4.685 ± 0.088
0.941ThrHis: 0.941 ± 0.039
4.093ThrIle: 4.093 ± 0.076
3.143ThrLys: 3.143 ± 0.071
4.603ThrLeu: 4.603 ± 0.098
1.328ThrMet: 1.328 ± 0.042
1.949ThrAsn: 1.949 ± 0.056
2.327ThrPro: 2.327 ± 0.058
1.466ThrGln: 1.466 ± 0.044
2.254ThrArg: 2.254 ± 0.062
2.909ThrSer: 2.909 ± 0.073
2.598ThrThr: 2.598 ± 0.062
3.506ThrVal: 3.506 ± 0.069
0.511ThrTrp: 0.511 ± 0.027
1.684ThrTyr: 1.684 ± 0.056
0.0ThrXaa: 0.0 ± 0.0
Val
4.985ValAla: 4.985 ± 0.088
0.891ValCys: 0.891 ± 0.037
3.531ValAsp: 3.531 ± 0.067
4.029ValGlu: 4.029 ± 0.083
3.13ValPhe: 3.13 ± 0.071
4.067ValGly: 4.067 ± 0.082
1.104ValHis: 1.104 ± 0.039
5.256ValIle: 5.256 ± 0.086
4.595ValLys: 4.595 ± 0.089
6.055ValLeu: 6.055 ± 0.09
1.707ValMet: 1.707 ± 0.047
2.819ValAsn: 2.819 ± 0.058
2.698ValPro: 2.698 ± 0.066
1.852ValGln: 1.852 ± 0.051
3.04ValArg: 3.04 ± 0.06
4.29ValSer: 4.29 ± 0.077
3.502ValThr: 3.502 ± 0.07
4.515ValVal: 4.515 ± 0.092
0.627ValTrp: 0.627 ± 0.026
1.899ValTyr: 1.899 ± 0.059
0.0ValXaa: 0.0 ± 0.0
Trp
0.714TrpAla: 0.714 ± 0.033
0.123TrpCys: 0.123 ± 0.015
0.561TrpAsp: 0.561 ± 0.028
0.683TrpGlu: 0.683 ± 0.032
0.474TrpPhe: 0.474 ± 0.031
0.664TrpGly: 0.664 ± 0.032
0.264TrpHis: 0.264 ± 0.022
0.748TrpIle: 0.748 ± 0.035
0.738TrpLys: 0.738 ± 0.028
1.105TrpLeu: 1.105 ± 0.037
0.303TrpMet: 0.303 ± 0.022
0.459TrpAsn: 0.459 ± 0.026
0.412TrpPro: 0.412 ± 0.026
0.496TrpGln: 0.496 ± 0.028
0.548TrpArg: 0.548 ± 0.028
0.541TrpSer: 0.541 ± 0.027
0.464TrpThr: 0.464 ± 0.024
0.535TrpVal: 0.535 ± 0.032
0.156TrpTrp: 0.156 ± 0.015
0.306TrpTyr: 0.306 ± 0.018
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.28TyrAla: 2.28 ± 0.057
0.494TyrCys: 0.494 ± 0.029
1.807TyrAsp: 1.807 ± 0.048
1.974TyrGlu: 1.974 ± 0.048
1.735TyrPhe: 1.735 ± 0.053
2.281TyrGly: 2.281 ± 0.052
0.748TyrHis: 0.748 ± 0.031
2.286TyrIle: 2.286 ± 0.062
2.196TyrLys: 2.196 ± 0.056
3.517TyrLeu: 3.517 ± 0.083
0.694TyrMet: 0.694 ± 0.03
1.474TyrAsn: 1.474 ± 0.046
1.539TyrPro: 1.539 ± 0.045
1.139TyrGln: 1.139 ± 0.048
1.903TyrArg: 1.903 ± 0.052
2.009TyrSer: 2.009 ± 0.056
1.58TyrThr: 1.58 ± 0.045
1.871TyrVal: 1.871 ± 0.045
0.436TyrTrp: 0.436 ± 0.025
1.311TyrTyr: 1.311 ± 0.05
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 2552 proteins (732155 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