Amino acid dipepetide frequency for Nostoc sp. PCC 7107

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
7.807AlaAla: 7.807 ± 0.091
0.824AlaCys: 0.824 ± 0.024
4.122AlaAsp: 4.122 ± 0.052
5.419AlaGlu: 5.419 ± 0.064
2.948AlaPhe: 2.948 ± 0.037
5.488AlaGly: 5.488 ± 0.075
1.302AlaHis: 1.302 ± 0.031
7.116AlaIle: 7.116 ± 0.077
4.356AlaLys: 4.356 ± 0.048
8.538AlaLeu: 8.538 ± 0.075
1.594AlaMet: 1.594 ± 0.031
3.754AlaAsn: 3.754 ± 0.061
2.822AlaPro: 2.822 ± 0.051
4.158AlaGln: 4.158 ± 0.058
3.457AlaArg: 3.457 ± 0.047
4.622AlaSer: 4.622 ± 0.064
4.89AlaThr: 4.89 ± 0.06
5.666AlaVal: 5.666 ± 0.059
1.03AlaTrp: 1.03 ± 0.026
2.441AlaTyr: 2.441 ± 0.042
0.0AlaXaa: 0.0 ± 0.0
Cys
0.664CysAla: 0.664 ± 0.024
0.165CysCys: 0.165 ± 0.01
0.59CysAsp: 0.59 ± 0.02
0.512CysGlu: 0.512 ± 0.017
0.411CysPhe: 0.411 ± 0.018
0.777CysGly: 0.777 ± 0.029
0.271CysHis: 0.271 ± 0.014
0.634CysIle: 0.634 ± 0.021
0.342CysLys: 0.342 ± 0.015
1.073CysLeu: 1.073 ± 0.023
0.152CysMet: 0.152 ± 0.012
0.391CysAsn: 0.391 ± 0.016
0.51CysPro: 0.51 ± 0.02
0.61CysGln: 0.61 ± 0.023
0.483CysArg: 0.483 ± 0.017
0.556CysSer: 0.556 ± 0.018
0.441CysThr: 0.441 ± 0.017
0.567CysVal: 0.567 ± 0.019
0.145CysTrp: 0.145 ± 0.01
0.356CysTyr: 0.356 ± 0.015
0.0CysXaa: 0.0 ± 0.0
Asp
3.577AspAla: 3.577 ± 0.049
0.476AspCys: 0.476 ± 0.019
2.274AspAsp: 2.274 ± 0.051
2.968AspGlu: 2.968 ± 0.047
2.353AspPhe: 2.353 ± 0.042
3.171AspGly: 3.171 ± 0.054
0.695AspHis: 0.695 ± 0.022
3.594AspIle: 3.594 ± 0.045
2.402AspLys: 2.402 ± 0.046
5.457AspLeu: 5.457 ± 0.075
0.766AspMet: 0.766 ± 0.02
2.145AspAsn: 2.145 ± 0.034
2.107AspPro: 2.107 ± 0.043
1.746AspGln: 1.746 ± 0.038
2.945AspArg: 2.945 ± 0.048
2.825AspSer: 2.825 ± 0.046
2.526AspThr: 2.526 ± 0.045
3.076AspVal: 3.076 ± 0.047
0.862AspTrp: 0.862 ± 0.02
1.88AspTyr: 1.88 ± 0.037
0.0AspXaa: 0.0 ± 0.0
Glu
5.192GluAla: 5.192 ± 0.06
0.508GluCys: 0.508 ± 0.02
2.607GluAsp: 2.607 ± 0.051
3.793GluGlu: 3.793 ± 0.062
2.517GluPhe: 2.517 ± 0.04
2.863GluGly: 2.863 ± 0.041
1.0GluHis: 1.0 ± 0.026
5.182GluIle: 5.182 ± 0.074
3.502GluLys: 3.502 ± 0.053
7.016GluLeu: 7.016 ± 0.081
1.288GluMet: 1.288 ± 0.03
2.764GluAsn: 2.764 ± 0.042
2.369GluPro: 2.369 ± 0.041
3.545GluGln: 3.545 ± 0.056
3.158GluArg: 3.158 ± 0.047
3.311GluSer: 3.311 ± 0.044
3.455GluThr: 3.455 ± 0.047
4.2GluVal: 4.2 ± 0.067
0.772GluTrp: 0.772 ± 0.021
1.919GluTyr: 1.919 ± 0.043
0.0GluXaa: 0.0 ± 0.0
Phe
3.277PheAla: 3.277 ± 0.046
0.527PheCys: 0.527 ± 0.018
2.14PheAsp: 2.14 ± 0.04
2.01PheGlu: 2.01 ± 0.035
1.638PhePhe: 1.638 ± 0.033
2.84PheGly: 2.84 ± 0.043
0.768PheHis: 0.768 ± 0.022
2.501PheIle: 2.501 ± 0.042
1.497PheLys: 1.497 ± 0.034
4.124PheLeu: 4.124 ± 0.059
0.709PheMet: 0.709 ± 0.018
1.83PheAsn: 1.83 ± 0.035
1.81PhePro: 1.81 ± 0.038
1.901PheGln: 1.901 ± 0.034
1.724PheArg: 1.724 ± 0.035
2.926PheSer: 2.926 ± 0.043
2.419PheThr: 2.419 ± 0.038
2.487PheVal: 2.487 ± 0.04
0.69PheTrp: 0.69 ± 0.023
1.408PheTyr: 1.408 ± 0.033
0.0PheXaa: 0.0 ± 0.0
Gly
4.758GlyAla: 4.758 ± 0.078
0.768GlyCys: 0.768 ± 0.024
3.266GlyAsp: 3.266 ± 0.05
3.948GlyGlu: 3.948 ± 0.047
2.784GlyPhe: 2.784 ± 0.044
4.607GlyGly: 4.607 ± 0.094
1.145GlyHis: 1.145 ± 0.031
5.065GlyIle: 5.065 ± 0.062
4.043GlyLys: 4.043 ± 0.052
6.852GlyLeu: 6.852 ± 0.066
1.395GlyMet: 1.395 ± 0.03
3.273GlyAsn: 3.273 ± 0.082
1.161GlyPro: 1.161 ± 0.032
2.881GlyGln: 2.881 ± 0.052
3.169GlyArg: 3.169 ± 0.055
4.014GlySer: 4.014 ± 0.062
3.783GlyThr: 3.783 ± 0.069
4.675GlyVal: 4.675 ± 0.058
1.076GlyTrp: 1.076 ± 0.025
2.419GlyTyr: 2.419 ± 0.041
0.0GlyXaa: 0.0 ± 0.0
His
1.008HisAla: 1.008 ± 0.026
0.246HisCys: 0.246 ± 0.012
0.747HisAsp: 0.747 ± 0.026
0.943HisGlu: 0.943 ± 0.025
0.755HisPhe: 0.755 ± 0.023
1.134HisGly: 1.134 ± 0.028
0.592HisHis: 0.592 ± 0.022
1.174HisIle: 1.174 ± 0.025
0.823HisLys: 0.823 ± 0.024
2.257HisLeu: 2.257 ± 0.045
0.165HisMet: 0.165 ± 0.01
0.832HisAsn: 0.832 ± 0.025
1.372HisPro: 1.372 ± 0.033
1.203HisGln: 1.203 ± 0.029
1.044HisArg: 1.044 ± 0.026
1.245HisSer: 1.245 ± 0.028
0.963HisThr: 0.963 ± 0.027
0.759HisVal: 0.759 ± 0.022
0.35HisTrp: 0.35 ± 0.013
0.668HisTyr: 0.668 ± 0.023
0.0HisXaa: 0.0 ± 0.0
Ile
7.409IleAla: 7.409 ± 0.072
0.749IleCys: 0.749 ± 0.02
3.652IleAsp: 3.652 ± 0.046
4.166IleGlu: 4.166 ± 0.052
2.742IlePhe: 2.742 ± 0.043
4.495IleGly: 4.495 ± 0.061
1.349IleHis: 1.349 ± 0.03
4.275IleIle: 4.275 ± 0.063
3.273IleLys: 3.273 ± 0.055
7.28IleLeu: 7.28 ± 0.074
0.917IleMet: 0.917 ± 0.027
3.376IleAsn: 3.376 ± 0.055
3.722IlePro: 3.722 ± 0.05
3.4IleGln: 3.4 ± 0.049
3.079IleArg: 3.079 ± 0.045
4.755IleSer: 4.755 ± 0.06
4.162IleThr: 4.162 ± 0.058
4.439IleVal: 4.439 ± 0.056
0.902IleTrp: 0.902 ± 0.025
2.185IleTyr: 2.185 ± 0.042
0.0IleXaa: 0.0 ± 0.0
Lys
3.985LysAla: 3.985 ± 0.055
0.339LysCys: 0.339 ± 0.014
2.145LysAsp: 2.145 ± 0.039
2.666LysGlu: 2.666 ± 0.047
1.892LysPhe: 1.892 ± 0.038
2.541LysGly: 2.541 ± 0.046
0.801LysHis: 0.801 ± 0.021
3.877LysIle: 3.877 ± 0.052
2.326LysLys: 2.326 ± 0.044
5.64LysLeu: 5.64 ± 0.062
0.976LysMet: 0.976 ± 0.021
2.276LysAsn: 2.276 ± 0.039
2.47LysPro: 2.47 ± 0.04
2.923LysGln: 2.923 ± 0.045
2.239LysArg: 2.239 ± 0.032
3.027LysSer: 3.027 ± 0.045
3.006LysThr: 3.006 ± 0.051
3.224LysVal: 3.224 ± 0.047
0.503LysTrp: 0.503 ± 0.017
1.586LysTyr: 1.586 ± 0.033
0.0LysXaa: 0.0 ± 0.0
Leu
9.741LeuAla: 9.741 ± 0.094
1.003LeuCys: 1.003 ± 0.024
5.186LeuAsp: 5.186 ± 0.058
7.164LeuGlu: 7.164 ± 0.087
3.808LeuPhe: 3.808 ± 0.055
7.582LeuGly: 7.582 ± 0.082
1.974LeuHis: 1.974 ± 0.038
7.138LeuIle: 7.138 ± 0.076
5.361LeuLys: 5.361 ± 0.064
11.479LeuLeu: 11.479 ± 0.106
2.06LeuMet: 2.06 ± 0.04
4.919LeuAsn: 4.919 ± 0.055
5.732LeuPro: 5.732 ± 0.067
6.213LeuGln: 6.213 ± 0.067
5.521LeuArg: 5.521 ± 0.069
7.408LeuSer: 7.408 ± 0.081
6.532LeuThr: 6.532 ± 0.073
7.189LeuVal: 7.189 ± 0.066
1.435LeuTrp: 1.435 ± 0.038
2.728LeuTyr: 2.728 ± 0.041
0.0LeuXaa: 0.0 ± 0.0
Met
1.617MetAla: 1.617 ± 0.032
0.134MetCys: 0.134 ± 0.01
0.671MetAsp: 0.671 ± 0.022
0.928MetGlu: 0.928 ± 0.026
0.531MetPhe: 0.531 ± 0.018
1.271MetGly: 1.271 ± 0.027
0.248MetHis: 0.248 ± 0.011
1.091MetIle: 1.091 ± 0.024
0.913MetLys: 0.913 ± 0.024
1.895MetLeu: 1.895 ± 0.037
0.438MetMet: 0.438 ± 0.019
0.904MetAsn: 0.904 ± 0.024
0.915MetPro: 0.915 ± 0.025
1.031MetGln: 1.031 ± 0.025
0.949MetArg: 0.949 ± 0.025
1.302MetSer: 1.302 ± 0.029
1.292MetThr: 1.292 ± 0.028
1.213MetVal: 1.213 ± 0.026
0.16MetTrp: 0.16 ± 0.01
0.365MetTyr: 0.365 ± 0.013
0.0MetXaa: 0.0 ± 0.0
Asn
3.154AsnAla: 3.154 ± 0.051
0.482AsnCys: 0.482 ± 0.017
1.789AsnAsp: 1.789 ± 0.035
1.895AsnGlu: 1.895 ± 0.038
2.056AsnPhe: 2.056 ± 0.042
2.815AsnGly: 2.815 ± 0.06
0.98AsnHis: 0.98 ± 0.025
3.29AsnIle: 3.29 ± 0.065
1.808AsnLys: 1.808 ± 0.033
5.952AsnLeu: 5.952 ± 0.085
0.636AsnMet: 0.636 ± 0.02
2.403AsnAsn: 2.403 ± 0.054
2.9AsnPro: 2.9 ± 0.048
2.96AsnGln: 2.96 ± 0.041
2.302AsnArg: 2.302 ± 0.041
3.389AsnSer: 3.389 ± 0.051
2.507AsnThr: 2.507 ± 0.05
2.432AsnVal: 2.432 ± 0.045
0.769AsnTrp: 0.769 ± 0.023
1.674AsnTyr: 1.674 ± 0.036
0.0AsnXaa: 0.0 ± 0.0
Pro
3.303ProAla: 3.303 ± 0.054
0.326ProCys: 0.326 ± 0.013
2.822ProAsp: 2.822 ± 0.044
3.936ProGlu: 3.936 ± 0.046
1.708ProPhe: 1.708 ± 0.035
3.014ProGly: 3.014 ± 0.045
0.879ProHis: 0.879 ± 0.024
3.122ProIle: 3.122 ± 0.047
2.252ProLys: 2.252 ± 0.038
4.576ProLeu: 4.576 ± 0.059
0.703ProMet: 0.703 ± 0.02
2.27ProAsn: 2.27 ± 0.034
2.155ProPro: 2.155 ± 0.039
2.756ProGln: 2.756 ± 0.042
1.697ProArg: 1.697 ± 0.033
2.777ProSer: 2.777 ± 0.044
2.855ProThr: 2.855 ± 0.048
3.277ProVal: 3.277 ± 0.054
0.586ProTrp: 0.586 ± 0.022
1.277ProTyr: 1.277 ± 0.032
0.0ProXaa: 0.0 ± 0.0
Gln
5.161GlnAla: 5.161 ± 0.069
0.361GlnCys: 0.361 ± 0.014
2.209GlnAsp: 2.209 ± 0.033
3.717GlnGlu: 3.717 ± 0.058
1.812GlnPhe: 1.812 ± 0.034
3.243GlnGly: 3.243 ± 0.045
0.924GlnHis: 0.924 ± 0.023
3.984GlnIle: 3.984 ± 0.056
3.018GlnLys: 3.018 ± 0.045
6.289GlnLeu: 6.289 ± 0.075
1.07GlnMet: 1.07 ± 0.026
2.403GlnAsn: 2.403 ± 0.041
2.811GlnPro: 2.811 ± 0.046
4.192GlnGln: 4.192 ± 0.081
2.928GlnArg: 2.928 ± 0.041
2.981GlnSer: 2.981 ± 0.048
3.195GlnThr: 3.195 ± 0.053
3.928GlnVal: 3.928 ± 0.052
0.65GlnTrp: 0.65 ± 0.019
1.357GlnTyr: 1.357 ± 0.031
0.0GlnXaa: 0.0 ± 0.0
Arg
3.029ArgAla: 3.029 ± 0.046
0.466ArgCys: 0.466 ± 0.018
2.45ArgAsp: 2.45 ± 0.038
3.078ArgGlu: 3.078 ± 0.046
2.058ArgPhe: 2.058 ± 0.035
2.839ArgGly: 2.839 ± 0.045
0.96ArgHis: 0.96 ± 0.025
3.266ArgIle: 3.266 ± 0.05
2.188ArgLys: 2.188 ± 0.039
5.674ArgLeu: 5.674 ± 0.065
0.98ArgMet: 0.98 ± 0.025
2.159ArgAsn: 2.159 ± 0.031
1.969ArgPro: 1.969 ± 0.038
3.347ArgGln: 3.347 ± 0.049
2.917ArgArg: 2.917 ± 0.051
3.074ArgSer: 3.074 ± 0.038
2.524ArgThr: 2.524 ± 0.043
3.264ArgVal: 3.264 ± 0.053
0.768ArgTrp: 0.768 ± 0.022
1.899ArgTyr: 1.899 ± 0.037
0.0ArgXaa: 0.0 ± 0.0
Ser
4.692SerAla: 4.692 ± 0.064
0.552SerCys: 0.552 ± 0.02
3.104SerAsp: 3.104 ± 0.046
3.675SerGlu: 3.675 ± 0.05
2.481SerPhe: 2.481 ± 0.037
4.557SerGly: 4.557 ± 0.058
1.336SerHis: 1.336 ± 0.029
3.877SerIle: 3.877 ± 0.047
2.636SerLys: 2.636 ± 0.046
7.475SerLeu: 7.475 ± 0.076
1.106SerMet: 1.106 ± 0.025
2.837SerAsn: 2.837 ± 0.056
3.303SerPro: 3.303 ± 0.054
3.782SerGln: 3.782 ± 0.05
3.09SerArg: 3.09 ± 0.039
4.336SerSer: 4.336 ± 0.068
3.594SerThr: 3.594 ± 0.056
4.069SerVal: 4.069 ± 0.052
0.898SerTrp: 0.898 ± 0.024
1.818SerTyr: 1.818 ± 0.037
0.0SerXaa: 0.0 ± 0.0
Thr
5.142ThrAla: 5.142 ± 0.061
0.492ThrCys: 0.492 ± 0.019
2.698ThrAsp: 2.698 ± 0.039
3.323ThrGlu: 3.323 ± 0.049
2.18ThrPhe: 2.18 ± 0.038
4.322ThrGly: 4.322 ± 0.062
1.026ThrHis: 1.026 ± 0.026
3.877ThrIle: 3.877 ± 0.052
2.476ThrLys: 2.476 ± 0.039
6.351ThrLeu: 6.351 ± 0.067
0.777ThrMet: 0.777 ± 0.022
2.547ThrAsn: 2.547 ± 0.048
3.442ThrPro: 3.442 ± 0.054
3.116ThrGln: 3.116 ± 0.047
2.319ThrArg: 2.319 ± 0.042
3.723ThrSer: 3.723 ± 0.052
3.727ThrThr: 3.727 ± 0.065
4.11ThrVal: 4.11 ± 0.048
0.71ThrTrp: 0.71 ± 0.021
1.641ThrTyr: 1.641 ± 0.035
0.0ThrXaa: 0.0 ± 0.0
Val
5.856ValAla: 5.856 ± 0.073
0.672ValCys: 0.672 ± 0.02
3.342ValAsp: 3.342 ± 0.051
4.209ValGlu: 4.209 ± 0.055
2.583ValPhe: 2.583 ± 0.044
4.567ValGly: 4.567 ± 0.061
0.999ValHis: 0.999 ± 0.024
4.592ValIle: 4.592 ± 0.056
3.36ValLys: 3.36 ± 0.051
6.651ValLeu: 6.651 ± 0.068
1.384ValMet: 1.384 ± 0.03
3.195ValAsn: 3.195 ± 0.055
2.794ValPro: 2.794 ± 0.049
2.967ValGln: 2.967 ± 0.047
3.092ValArg: 3.092 ± 0.043
4.185ValSer: 4.185 ± 0.047
3.926ValThr: 3.926 ± 0.06
4.851ValVal: 4.851 ± 0.058
0.839ValTrp: 0.839 ± 0.025
1.886ValTyr: 1.886 ± 0.032
0.0ValXaa: 0.0 ± 0.0
Trp
0.839TrpAla: 0.839 ± 0.022
0.155TrpCys: 0.155 ± 0.01
0.607TrpAsp: 0.607 ± 0.024
0.898TrpGlu: 0.898 ± 0.023
0.57TrpPhe: 0.57 ± 0.021
0.942TrpGly: 0.942 ± 0.025
0.333TrpHis: 0.333 ± 0.017
0.824TrpIle: 0.824 ± 0.023
0.57TrpLys: 0.57 ± 0.016
1.914TrpLeu: 1.914 ± 0.041
0.318TrpMet: 0.318 ± 0.014
0.606TrpAsn: 0.606 ± 0.021
0.29TrpPro: 0.29 ± 0.013
1.256TrpGln: 1.256 ± 0.029
0.842TrpArg: 0.842 ± 0.023
0.797TrpSer: 0.797 ± 0.025
0.567TrpThr: 0.567 ± 0.019
0.923TrpVal: 0.923 ± 0.028
0.236TrpTrp: 0.236 ± 0.013
0.434TrpTyr: 0.434 ± 0.016
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.145TyrAla: 2.145 ± 0.039
0.405TyrCys: 0.405 ± 0.017
1.425TyrAsp: 1.425 ± 0.032
1.713TyrGlu: 1.713 ± 0.032
1.398TyrPhe: 1.398 ± 0.031
2.013TyrGly: 2.013 ± 0.034
0.699TyrHis: 0.699 ± 0.025
1.847TyrIle: 1.847 ± 0.034
1.295TyrLys: 1.295 ± 0.03
3.679TyrLeu: 3.679 ± 0.055
0.434TyrMet: 0.434 ± 0.015
1.309TyrAsn: 1.309 ± 0.035
1.633TyrPro: 1.633 ± 0.034
2.247TyrGln: 2.247 ± 0.041
1.958TyrArg: 1.958 ± 0.038
1.962TyrSer: 1.962 ± 0.035
1.636TyrThr: 1.636 ± 0.03
1.603TyrVal: 1.603 ± 0.034
0.54TyrTrp: 0.54 ± 0.021
1.143TyrTyr: 1.143 ± 0.03
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 5185 proteins (1692159 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