Amino acid dipepetide frequency for bacterium SGD-2

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
17.445AlaAla: 17.445 ± 0.214
1.174AlaCys: 1.174 ± 0.033
6.58AlaAsp: 6.58 ± 0.084
7.305AlaGlu: 7.305 ± 0.112
3.902AlaPhe: 3.902 ± 0.061
10.767AlaGly: 10.767 ± 0.113
2.664AlaHis: 2.664 ± 0.053
5.458AlaIle: 5.458 ± 0.085
2.862AlaLys: 2.862 ± 0.068
13.816AlaLeu: 13.816 ± 0.136
3.29AlaMet: 3.29 ± 0.061
2.576AlaAsn: 2.576 ± 0.047
5.645AlaPro: 5.645 ± 0.096
4.762AlaGln: 4.762 ± 0.067
9.554AlaArg: 9.554 ± 0.104
5.784AlaSer: 5.784 ± 0.071
5.764AlaThr: 5.764 ± 0.078
9.239AlaVal: 9.239 ± 0.115
1.648AlaTrp: 1.648 ± 0.037
2.563AlaTyr: 2.563 ± 0.048
0.0AlaXaa: 0.0 ± 0.0
Cys
1.053CysAla: 1.053 ± 0.032
0.124CysCys: 0.124 ± 0.012
0.497CysAsp: 0.497 ± 0.02
0.487CysGlu: 0.487 ± 0.019
0.31CysPhe: 0.31 ± 0.016
0.939CysGly: 0.939 ± 0.031
0.242CysHis: 0.242 ± 0.014
0.365CysIle: 0.365 ± 0.017
0.184CysLys: 0.184 ± 0.012
0.802CysLeu: 0.802 ± 0.028
0.207CysMet: 0.207 ± 0.013
0.232CysAsn: 0.232 ± 0.013
0.481CysPro: 0.481 ± 0.025
0.224CysGln: 0.224 ± 0.014
0.643CysArg: 0.643 ± 0.024
0.504CysSer: 0.504 ± 0.019
0.485CysThr: 0.485 ± 0.022
0.732CysVal: 0.732 ± 0.024
0.114CysTrp: 0.114 ± 0.009
0.189CysTyr: 0.189 ± 0.013
0.0CysXaa: 0.0 ± 0.0
Asp
6.913AspAla: 6.913 ± 0.102
0.435AspCys: 0.435 ± 0.021
3.268AspAsp: 3.268 ± 0.077
3.586AspGlu: 3.586 ± 0.055
1.908AspPhe: 1.908 ± 0.043
4.594AspGly: 4.594 ± 0.074
1.156AspHis: 1.156 ± 0.03
2.86AspIle: 2.86 ± 0.05
1.269AspLys: 1.269 ± 0.033
5.532AspLeu: 5.532 ± 0.07
1.334AspMet: 1.334 ± 0.031
1.111AspAsn: 1.111 ± 0.031
3.517AspPro: 3.517 ± 0.052
1.566AspGln: 1.566 ± 0.038
3.739AspArg: 3.739 ± 0.065
2.372AspSer: 2.372 ± 0.045
3.123AspThr: 3.123 ± 0.049
4.29AspVal: 4.29 ± 0.07
0.891AspTrp: 0.891 ± 0.025
1.428AspTyr: 1.428 ± 0.033
0.0AspXaa: 0.0 ± 0.0
Glu
7.291GluAla: 7.291 ± 0.104
0.45GluCys: 0.45 ± 0.02
2.64GluAsp: 2.64 ± 0.054
3.28GluGlu: 3.28 ± 0.072
1.986GluPhe: 1.986 ± 0.041
4.299GluGly: 4.299 ± 0.068
1.638GluHis: 1.638 ± 0.041
3.393GluIle: 3.393 ± 0.063
1.989GluLys: 1.989 ± 0.049
6.193GluLeu: 6.193 ± 0.085
1.42GluMet: 1.42 ± 0.031
1.59GluAsn: 1.59 ± 0.037
3.133GluPro: 3.133 ± 0.052
2.653GluGln: 2.653 ± 0.053
5.336GluArg: 5.336 ± 0.076
2.838GluSer: 2.838 ± 0.046
3.062GluThr: 3.062 ± 0.053
4.236GluVal: 4.236 ± 0.064
0.785GluTrp: 0.785 ± 0.027
1.285GluTyr: 1.285 ± 0.038
0.0GluXaa: 0.0 ± 0.0
Phe
3.792PheAla: 3.792 ± 0.067
0.317PheCys: 0.317 ± 0.018
2.478PheAsp: 2.478 ± 0.049
2.137PheGlu: 2.137 ± 0.043
1.23PhePhe: 1.23 ± 0.038
3.259PheGly: 3.259 ± 0.058
0.765PheHis: 0.765 ± 0.026
1.607PheIle: 1.607 ± 0.042
0.887PheLys: 0.887 ± 0.03
3.024PheLeu: 3.024 ± 0.059
0.821PheMet: 0.821 ± 0.029
1.034PheAsn: 1.034 ± 0.03
1.523PhePro: 1.523 ± 0.034
0.99PheGln: 0.99 ± 0.026
2.082PheArg: 2.082 ± 0.04
2.047PheSer: 2.047 ± 0.043
1.94PheThr: 1.94 ± 0.041
2.772PheVal: 2.772 ± 0.049
0.485PheTrp: 0.485 ± 0.024
0.845PheTyr: 0.845 ± 0.027
0.0PheXaa: 0.0 ± 0.0
Gly
8.979GlyAla: 8.979 ± 0.103
0.852GlyCys: 0.852 ± 0.028
4.157GlyAsp: 4.157 ± 0.062
4.684GlyGlu: 4.684 ± 0.064
3.134GlyPhe: 3.134 ± 0.052
6.748GlyGly: 6.748 ± 0.09
2.027GlyHis: 2.027 ± 0.044
4.393GlyIle: 4.393 ± 0.07
2.89GlyLys: 2.89 ± 0.056
8.699GlyLeu: 8.699 ± 0.094
2.456GlyMet: 2.456 ± 0.045
2.138GlyAsn: 2.138 ± 0.049
3.426GlyPro: 3.426 ± 0.06
2.85GlyGln: 2.85 ± 0.049
6.228GlyArg: 6.228 ± 0.073
4.54GlySer: 4.54 ± 0.056
4.667GlyThr: 4.667 ± 0.067
6.827GlyVal: 6.827 ± 0.084
1.301GlyTrp: 1.301 ± 0.038
2.269GlyTyr: 2.269 ± 0.047
0.0GlyXaa: 0.0 ± 0.0
His
2.88HisAla: 2.88 ± 0.059
0.276HisCys: 0.276 ± 0.015
1.491HisAsp: 1.491 ± 0.041
1.431HisGlu: 1.431 ± 0.033
0.849HisPhe: 0.849 ± 0.026
2.12HisGly: 2.12 ± 0.042
0.637HisHis: 0.637 ± 0.029
1.091HisIle: 1.091 ± 0.032
0.473HisLys: 0.473 ± 0.019
2.096HisLeu: 2.096 ± 0.044
0.549HisMet: 0.549 ± 0.023
0.548HisAsn: 0.548 ± 0.023
1.536HisPro: 1.536 ± 0.042
0.674HisGln: 0.674 ± 0.026
1.547HisArg: 1.547 ± 0.041
1.062HisSer: 1.062 ± 0.033
1.174HisThr: 1.174 ± 0.033
1.811HisVal: 1.811 ± 0.043
0.319HisTrp: 0.319 ± 0.018
0.669HisTyr: 0.669 ± 0.023
0.0HisXaa: 0.0 ± 0.0
Ile
6.128IleAla: 6.128 ± 0.084
0.431IleCys: 0.431 ± 0.018
3.42IleAsp: 3.42 ± 0.048
3.434IleGlu: 3.434 ± 0.054
1.424IlePhe: 1.424 ± 0.04
4.304IleGly: 4.304 ± 0.066
0.928IleHis: 0.928 ± 0.027
2.231IleIle: 2.231 ± 0.048
1.281IleLys: 1.281 ± 0.035
4.138IleLeu: 4.138 ± 0.064
1.056IleMet: 1.056 ± 0.03
1.386IleAsn: 1.386 ± 0.036
2.325IlePro: 2.325 ± 0.044
1.357IleGln: 1.357 ± 0.037
3.218IleArg: 3.218 ± 0.049
2.611IleSer: 2.611 ± 0.046
2.847IleThr: 2.847 ± 0.048
4.045IleVal: 4.045 ± 0.057
0.5IleTrp: 0.5 ± 0.02
1.076IleTyr: 1.076 ± 0.031
0.0IleXaa: 0.0 ± 0.0
Lys
3.341LysAla: 3.341 ± 0.071
0.162LysCys: 0.162 ± 0.012
1.312LysAsp: 1.312 ± 0.037
1.559LysGlu: 1.559 ± 0.051
0.752LysPhe: 0.752 ± 0.027
2.271LysGly: 2.271 ± 0.047
0.572LysHis: 0.572 ± 0.022
1.303LysIle: 1.303 ± 0.04
1.101LysLys: 1.101 ± 0.045
2.793LysLeu: 2.793 ± 0.052
0.678LysMet: 0.678 ± 0.023
0.768LysAsn: 0.768 ± 0.029
1.661LysPro: 1.661 ± 0.041
1.038LysGln: 1.038 ± 0.03
2.02LysArg: 2.02 ± 0.04
1.441LysSer: 1.441 ± 0.039
1.479LysThr: 1.479 ± 0.04
2.263LysVal: 2.263 ± 0.044
0.346LysTrp: 0.346 ± 0.018
0.601LysTyr: 0.601 ± 0.025
0.0LysXaa: 0.0 ± 0.0
Leu
13.95LeuAla: 13.95 ± 0.138
0.913LeuCys: 0.913 ± 0.027
6.105LeuAsp: 6.105 ± 0.079
6.182LeuGlu: 6.182 ± 0.074
3.404LeuPhe: 3.404 ± 0.063
8.551LeuGly: 8.551 ± 0.104
2.417LeuHis: 2.417 ± 0.054
4.721LeuIle: 4.721 ± 0.077
2.959LeuLys: 2.959 ± 0.049
10.51LeuLeu: 10.51 ± 0.124
2.336LeuMet: 2.336 ± 0.045
2.75LeuAsn: 2.75 ± 0.047
5.908LeuPro: 5.908 ± 0.071
3.73LeuGln: 3.73 ± 0.063
7.962LeuArg: 7.962 ± 0.089
5.807LeuSer: 5.807 ± 0.065
5.348LeuThr: 5.348 ± 0.075
7.694LeuVal: 7.694 ± 0.102
1.145LeuTrp: 1.145 ± 0.033
2.143LeuTyr: 2.143 ± 0.046
0.0LeuXaa: 0.0 ± 0.0
Met
2.913MetAla: 2.913 ± 0.047
0.168MetCys: 0.168 ± 0.011
0.943MetAsp: 0.943 ± 0.027
1.073MetGlu: 1.073 ± 0.034
0.754MetPhe: 0.754 ± 0.026
1.861MetGly: 1.861 ± 0.042
0.552MetHis: 0.552 ± 0.021
1.113MetIle: 1.113 ± 0.029
0.907MetLys: 0.907 ± 0.026
2.845MetLeu: 2.845 ± 0.048
0.542MetMet: 0.542 ± 0.021
0.851MetAsn: 0.851 ± 0.027
1.466MetPro: 1.466 ± 0.038
1.041MetGln: 1.041 ± 0.031
1.767MetArg: 1.767 ± 0.04
1.75MetSer: 1.75 ± 0.037
1.572MetThr: 1.572 ± 0.039
1.747MetVal: 1.747 ± 0.039
0.222MetTrp: 0.222 ± 0.014
0.371MetTyr: 0.371 ± 0.018
0.0MetXaa: 0.0 ± 0.0
Asn
3.137AsnAla: 3.137 ± 0.053
0.222AsnCys: 0.222 ± 0.012
1.398AsnAsp: 1.398 ± 0.033
1.422AsnGlu: 1.422 ± 0.031
0.875AsnPhe: 0.875 ± 0.03
2.197AsnGly: 2.197 ± 0.046
0.521AsnHis: 0.521 ± 0.018
1.326AsnIle: 1.326 ± 0.036
0.64AsnLys: 0.64 ± 0.024
2.58AsnLeu: 2.58 ± 0.05
0.604AsnMet: 0.604 ± 0.025
0.62AsnAsn: 0.62 ± 0.021
1.87AsnPro: 1.87 ± 0.037
0.779AsnGln: 0.779 ± 0.027
1.827AsnArg: 1.827 ± 0.035
1.127AsnSer: 1.127 ± 0.031
1.382AsnThr: 1.382 ± 0.035
2.033AsnVal: 2.033 ± 0.037
0.365AsnTrp: 0.365 ± 0.019
0.637AsnTyr: 0.637 ± 0.022
0.0AsnXaa: 0.0 ± 0.0
Pro
6.843ProAla: 6.843 ± 0.114
0.373ProCys: 0.373 ± 0.019
3.761ProAsp: 3.761 ± 0.054
4.249ProGlu: 4.249 ± 0.061
1.764ProPhe: 1.764 ± 0.04
4.822ProGly: 4.822 ± 0.066
1.157ProHis: 1.157 ± 0.03
2.023ProIle: 2.023 ± 0.038
1.237ProLys: 1.237 ± 0.033
4.926ProLeu: 4.926 ± 0.069
1.175ProMet: 1.175 ± 0.03
1.304ProAsn: 1.304 ± 0.032
2.625ProPro: 2.625 ± 0.055
2.07ProGln: 2.07 ± 0.042
3.21ProArg: 3.21 ± 0.06
2.632ProSer: 2.632 ± 0.049
2.298ProThr: 2.298 ± 0.041
4.764ProVal: 4.764 ± 0.068
0.738ProTrp: 0.738 ± 0.026
1.273ProTyr: 1.273 ± 0.032
0.0ProXaa: 0.0 ± 0.0
Gln
5.04GlnAla: 5.04 ± 0.08
0.264GlnCys: 0.264 ± 0.014
1.332GlnAsp: 1.332 ± 0.035
1.819GlnGlu: 1.819 ± 0.042
1.138GlnPhe: 1.138 ± 0.03
2.771GlnGly: 2.771 ± 0.052
0.931GlnHis: 0.931 ± 0.03
1.795GlnIle: 1.795 ± 0.036
1.029GlnLys: 1.029 ± 0.031
3.647GlnLeu: 3.647 ± 0.058
0.869GlnMet: 0.869 ± 0.03
0.904GlnAsn: 0.904 ± 0.029
2.054GlnPro: 2.054 ± 0.039
1.711GlnGln: 1.711 ± 0.044
3.164GlnArg: 3.164 ± 0.056
1.672GlnSer: 1.672 ± 0.044
1.664GlnThr: 1.664 ± 0.041
2.697GlnVal: 2.697 ± 0.044
0.605GlnTrp: 0.605 ± 0.023
0.852GlnTyr: 0.852 ± 0.022
0.0GlnXaa: 0.0 ± 0.0
Arg
7.885ArgAla: 7.885 ± 0.101
0.61ArgCys: 0.61 ± 0.025
3.908ArgAsp: 3.908 ± 0.058
4.738ArgGlu: 4.738 ± 0.064
2.703ArgPhe: 2.703 ± 0.049
4.793ArgGly: 4.793 ± 0.069
2.039ArgHis: 2.039 ± 0.044
4.141ArgIle: 4.141 ± 0.059
2.247ArgLys: 2.247 ± 0.056
8.227ArgLeu: 8.227 ± 0.088
2.038ArgMet: 2.038 ± 0.037
2.183ArgAsn: 2.183 ± 0.041
3.717ArgPro: 3.717 ± 0.064
2.906ArgGln: 2.906 ± 0.053
6.325ArgArg: 6.325 ± 0.101
3.991ArgSer: 3.991 ± 0.056
3.457ArgThr: 3.457 ± 0.06
5.447ArgVal: 5.447 ± 0.076
1.123ArgTrp: 1.123 ± 0.035
2.105ArgTyr: 2.105 ± 0.04
0.0ArgXaa: 0.0 ± 0.0
Ser
5.811SerAla: 5.811 ± 0.073
0.431SerCys: 0.431 ± 0.019
2.706SerAsp: 2.706 ± 0.047
2.715SerGlu: 2.715 ± 0.044
1.97SerPhe: 1.97 ± 0.045
5.278SerGly: 5.278 ± 0.076
1.131SerHis: 1.131 ± 0.032
2.575SerIle: 2.575 ± 0.045
1.257SerLys: 1.257 ± 0.033
5.388SerLeu: 5.388 ± 0.068
1.376SerMet: 1.376 ± 0.034
1.266SerAsn: 1.266 ± 0.03
2.74SerPro: 2.74 ± 0.044
1.66SerGln: 1.66 ± 0.043
3.785SerArg: 3.785 ± 0.059
2.821SerSer: 2.821 ± 0.054
2.743SerThr: 2.743 ± 0.048
4.126SerVal: 4.126 ± 0.058
0.755SerTrp: 0.755 ± 0.025
1.173SerTyr: 1.173 ± 0.032
0.0SerXaa: 0.0 ± 0.0
Thr
5.916ThrAla: 5.916 ± 0.07
0.422ThrCys: 0.422 ± 0.02
2.671ThrAsp: 2.671 ± 0.046
2.7ThrGlu: 2.7 ± 0.053
1.68ThrPhe: 1.68 ± 0.043
4.948ThrGly: 4.948 ± 0.068
1.241ThrHis: 1.241 ± 0.034
2.386ThrIle: 2.386 ± 0.049
1.07ThrLys: 1.07 ± 0.03
6.3ThrLeu: 6.3 ± 0.076
1.057ThrMet: 1.057 ± 0.03
1.165ThrAsn: 1.165 ± 0.027
3.504ThrPro: 3.504 ± 0.059
1.648ThrGln: 1.648 ± 0.035
3.591ThrArg: 3.591 ± 0.046
2.468ThrSer: 2.468 ± 0.048
2.777ThrThr: 2.777 ± 0.059
4.607ThrVal: 4.607 ± 0.066
0.7ThrTrp: 0.7 ± 0.025
1.122ThrTyr: 1.122 ± 0.029
0.0ThrXaa: 0.0 ± 0.0
Val
9.604ValAla: 9.604 ± 0.129
0.804ValCys: 0.804 ± 0.026
4.247ValAsp: 4.247 ± 0.072
4.729ValGlu: 4.729 ± 0.068
2.816ValPhe: 2.816 ± 0.053
5.707ValGly: 5.707 ± 0.071
1.746ValHis: 1.746 ± 0.038
3.804ValIle: 3.804 ± 0.062
2.155ValLys: 2.155 ± 0.056
8.79ValLeu: 8.79 ± 0.102
1.835ValMet: 1.835 ± 0.044
2.126ValAsn: 2.126 ± 0.037
4.196ValPro: 4.196 ± 0.072
2.809ValGln: 2.809 ± 0.05
5.504ValArg: 5.504 ± 0.062
4.313ValSer: 4.313 ± 0.057
4.339ValThr: 4.339 ± 0.063
6.829ValVal: 6.829 ± 0.086
0.957ValTrp: 0.957 ± 0.028
1.684ValTyr: 1.684 ± 0.035
0.0ValXaa: 0.0 ± 0.0
Trp
1.306TrpAla: 1.306 ± 0.036
0.138TrpCys: 0.138 ± 0.011
0.524TrpAsp: 0.524 ± 0.021
0.611TrpGlu: 0.611 ± 0.025
0.537TrpPhe: 0.537 ± 0.022
0.905TrpGly: 0.905 ± 0.027
0.388TrpHis: 0.388 ± 0.018
0.603TrpIle: 0.603 ± 0.025
0.418TrpLys: 0.418 ± 0.02
1.872TrpLeu: 1.872 ± 0.042
0.347TrpMet: 0.347 ± 0.016
0.437TrpAsn: 0.437 ± 0.02
0.724TrpPro: 0.724 ± 0.028
0.679TrpGln: 0.679 ± 0.026
1.221TrpArg: 1.221 ± 0.038
0.717TrpSer: 0.717 ± 0.026
0.58TrpThr: 0.58 ± 0.022
1.016TrpVal: 1.016 ± 0.031
0.252TrpTrp: 0.252 ± 0.014
0.347TrpTyr: 0.347 ± 0.016
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.57TyrAla: 2.57 ± 0.044
0.251TyrCys: 0.251 ± 0.013
1.453TyrAsp: 1.453 ± 0.034
1.359TyrGlu: 1.359 ± 0.033
0.899TyrPhe: 0.899 ± 0.028
2.129TyrGly: 2.129 ± 0.044
0.481TyrHis: 0.481 ± 0.02
0.946TyrIle: 0.946 ± 0.03
0.605TyrLys: 0.605 ± 0.024
2.361TyrLeu: 2.361 ± 0.044
0.469TyrMet: 0.469 ± 0.02
0.573TyrAsn: 0.573 ± 0.023
1.195TyrPro: 1.195 ± 0.032
0.81TyrGln: 0.81 ± 0.024
1.859TyrArg: 1.859 ± 0.041
1.215TyrSer: 1.215 ± 0.036
1.272TyrThr: 1.272 ± 0.033
1.817TyrVal: 1.817 ± 0.039
0.37TyrTrp: 0.37 ± 0.017
0.597TyrTyr: 0.597 ± 0.026
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 3826 proteins (1258729 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