Amino acid dipepetide frequency for Rhodovulum sp. NI22

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
17.761AlaAla: 17.761 ± 0.177
1.077AlaCys: 1.077 ± 0.034
7.179AlaAsp: 7.179 ± 0.098
8.689AlaGlu: 8.689 ± 0.102
4.556AlaPhe: 4.556 ± 0.068
11.357AlaGly: 11.357 ± 0.119
2.418AlaHis: 2.418 ± 0.045
5.775AlaIle: 5.775 ± 0.071
3.511AlaLys: 3.511 ± 0.067
14.563AlaLeu: 14.563 ± 0.139
3.828AlaMet: 3.828 ± 0.064
2.567AlaAsn: 2.567 ± 0.047
6.291AlaPro: 6.291 ± 0.095
4.445AlaGln: 4.445 ± 0.067
9.808AlaArg: 9.808 ± 0.114
5.191AlaSer: 5.191 ± 0.076
5.851AlaThr: 5.851 ± 0.068
8.615AlaVal: 8.615 ± 0.102
1.459AlaTrp: 1.459 ± 0.037
2.608AlaTyr: 2.608 ± 0.046
0.0AlaXaa: 0.0 ± 0.0
Cys
1.114CysAla: 1.114 ± 0.041
0.092CysCys: 0.092 ± 0.01
0.616CysAsp: 0.616 ± 0.023
0.413CysGlu: 0.413 ± 0.021
0.319CysPhe: 0.319 ± 0.019
0.922CysGly: 0.922 ± 0.027
0.293CysHis: 0.293 ± 0.022
0.378CysIle: 0.378 ± 0.019
0.198CysLys: 0.198 ± 0.014
0.861CysLeu: 0.861 ± 0.028
0.15CysMet: 0.15 ± 0.012
0.204CysAsn: 0.204 ± 0.014
0.528CysPro: 0.528 ± 0.025
0.206CysGln: 0.206 ± 0.015
0.565CysArg: 0.565 ± 0.026
0.415CysSer: 0.415 ± 0.019
0.432CysThr: 0.432 ± 0.021
0.604CysVal: 0.604 ± 0.029
0.117CysTrp: 0.117 ± 0.009
0.189CysTyr: 0.189 ± 0.012
0.0CysXaa: 0.0 ± 0.0
Asp
7.28AspAla: 7.28 ± 0.098
0.515AspCys: 0.515 ± 0.024
3.294AspAsp: 3.294 ± 0.061
3.558AspGlu: 3.558 ± 0.054
2.303AspPhe: 2.303 ± 0.046
5.278AspGly: 5.278 ± 0.081
1.295AspHis: 1.295 ± 0.036
3.05AspIle: 3.05 ± 0.049
1.657AspLys: 1.657 ± 0.039
6.236AspLeu: 6.236 ± 0.093
1.701AspMet: 1.701 ± 0.041
1.185AspAsn: 1.185 ± 0.035
3.667AspPro: 3.667 ± 0.064
1.761AspGln: 1.761 ± 0.041
4.104AspArg: 4.104 ± 0.069
2.044AspSer: 2.044 ± 0.047
2.944AspThr: 2.944 ± 0.053
4.129AspVal: 4.129 ± 0.062
1.095AspTrp: 1.095 ± 0.037
1.467AspTyr: 1.467 ± 0.043
0.0AspXaa: 0.0 ± 0.0
Glu
8.101GluAla: 8.101 ± 0.095
0.351GluCys: 0.351 ± 0.021
3.263GluAsp: 3.263 ± 0.059
3.718GluGlu: 3.718 ± 0.086
1.878GluPhe: 1.878 ± 0.047
4.929GluGly: 4.929 ± 0.072
1.167GluHis: 1.167 ± 0.035
3.636GluIle: 3.636 ± 0.062
2.349GluLys: 2.349 ± 0.054
5.303GluLeu: 5.303 ± 0.071
1.812GluMet: 1.812 ± 0.044
1.757GluAsn: 1.757 ± 0.042
2.516GluPro: 2.516 ± 0.062
2.016GluGln: 2.016 ± 0.054
4.361GluArg: 4.361 ± 0.067
2.245GluSer: 2.245 ± 0.054
3.813GluThr: 3.813 ± 0.055
4.335GluVal: 4.335 ± 0.069
0.696GluTrp: 0.696 ± 0.025
1.153GluTyr: 1.153 ± 0.039
0.0GluXaa: 0.0 ± 0.0
Phe
4.613PheAla: 4.613 ± 0.064
0.405PheCys: 0.405 ± 0.02
2.786PheAsp: 2.786 ± 0.05
2.192PheGlu: 2.192 ± 0.051
1.514PhePhe: 1.514 ± 0.047
3.856PheGly: 3.856 ± 0.073
0.802PheHis: 0.802 ± 0.026
1.705PheIle: 1.705 ± 0.041
0.918PheLys: 0.918 ± 0.031
3.623PheLeu: 3.623 ± 0.061
0.888PheMet: 0.888 ± 0.031
1.038PheAsn: 1.038 ± 0.033
1.619PhePro: 1.619 ± 0.042
1.03PheGln: 1.03 ± 0.035
2.434PheArg: 2.434 ± 0.049
2.205PheSer: 2.205 ± 0.046
2.139PheThr: 2.139 ± 0.05
2.715PheVal: 2.715 ± 0.057
0.556PheTrp: 0.556 ± 0.023
0.975PheTyr: 0.975 ± 0.032
0.0PheXaa: 0.0 ± 0.0
Gly
10.922GlyAla: 10.922 ± 0.113
0.883GlyCys: 0.883 ± 0.031
4.788GlyAsp: 4.788 ± 0.075
4.716GlyGlu: 4.716 ± 0.072
3.852GlyPhe: 3.852 ± 0.063
7.703GlyGly: 7.703 ± 0.122
1.935GlyHis: 1.935 ± 0.042
4.474GlyIle: 4.474 ± 0.062
3.204GlyLys: 3.204 ± 0.057
9.559GlyLeu: 9.559 ± 0.111
2.64GlyMet: 2.64 ± 0.049
2.083GlyAsn: 2.083 ± 0.047
3.887GlyPro: 3.887 ± 0.061
3.003GlyGln: 3.003 ± 0.052
6.093GlyArg: 6.093 ± 0.071
3.839GlySer: 3.839 ± 0.071
4.7GlyThr: 4.7 ± 0.071
6.596GlyVal: 6.596 ± 0.085
1.554GlyTrp: 1.554 ± 0.04
2.328GlyTyr: 2.328 ± 0.054
0.0GlyXaa: 0.0 ± 0.0
His
2.295HisAla: 2.295 ± 0.047
0.209HisCys: 0.209 ± 0.013
1.282HisAsp: 1.282 ± 0.039
1.1HisGlu: 1.1 ± 0.034
0.851HisPhe: 0.851 ± 0.029
1.925HisGly: 1.925 ± 0.042
0.518HisHis: 0.518 ± 0.022
0.972HisIle: 0.972 ± 0.032
0.499HisLys: 0.499 ± 0.023
2.079HisLeu: 2.079 ± 0.045
0.554HisMet: 0.554 ± 0.02
0.432HisAsn: 0.432 ± 0.022
1.381HisPro: 1.381 ± 0.033
0.548HisGln: 0.548 ± 0.02
1.333HisArg: 1.333 ± 0.039
0.903HisSer: 0.903 ± 0.034
0.851HisThr: 0.851 ± 0.029
1.532HisVal: 1.532 ± 0.039
0.345HisTrp: 0.345 ± 0.019
0.578HisTyr: 0.578 ± 0.025
0.0HisXaa: 0.0 ± 0.0
Ile
7.04IleAla: 7.04 ± 0.083
0.612IleCys: 0.612 ± 0.021
3.292IleAsp: 3.292 ± 0.056
3.528IleGlu: 3.528 ± 0.058
1.787IlePhe: 1.787 ± 0.042
4.903IleGly: 4.903 ± 0.066
0.945IleHis: 0.945 ± 0.031
2.205IleIle: 2.205 ± 0.059
1.271IleLys: 1.271 ± 0.038
4.779IleLeu: 4.779 ± 0.077
1.041IleMet: 1.041 ± 0.032
1.354IleAsn: 1.354 ± 0.036
2.375IlePro: 2.375 ± 0.051
1.11IleGln: 1.11 ± 0.031
3.381IleArg: 3.381 ± 0.061
2.915IleSer: 2.915 ± 0.052
2.969IleThr: 2.969 ± 0.055
3.795IleVal: 3.795 ± 0.067
0.696IleTrp: 0.696 ± 0.026
1.161IleTyr: 1.161 ± 0.032
0.0IleXaa: 0.0 ± 0.0
Lys
3.868LysAla: 3.868 ± 0.064
0.187LysCys: 0.187 ± 0.014
1.648LysAsp: 1.648 ± 0.046
1.561LysGlu: 1.561 ± 0.046
0.91LysPhe: 0.91 ± 0.032
2.731LysGly: 2.731 ± 0.06
0.535LysHis: 0.535 ± 0.024
1.592LysIle: 1.592 ± 0.042
1.184LysLys: 1.184 ± 0.037
2.971LysLeu: 2.971 ± 0.054
0.804LysMet: 0.804 ± 0.032
0.735LysAsn: 0.735 ± 0.028
1.783LysPro: 1.783 ± 0.044
0.953LysGln: 0.953 ± 0.032
2.223LysArg: 2.223 ± 0.056
1.796LysSer: 1.796 ± 0.047
1.946LysThr: 1.946 ± 0.04
2.268LysVal: 2.268 ± 0.05
0.4LysTrp: 0.4 ± 0.02
0.638LysTyr: 0.638 ± 0.025
0.0LysXaa: 0.0 ± 0.0
Leu
13.42LeuAla: 13.42 ± 0.151
0.935LeuCys: 0.935 ± 0.029
5.926LeuAsp: 5.926 ± 0.091
5.662LeuGlu: 5.662 ± 0.072
3.65LeuPhe: 3.65 ± 0.068
8.696LeuGly: 8.696 ± 0.102
1.894LeuHis: 1.894 ± 0.048
5.389LeuIle: 5.389 ± 0.068
3.373LeuLys: 3.373 ± 0.068
9.256LeuLeu: 9.256 ± 0.138
2.715LeuMet: 2.715 ± 0.061
2.717LeuAsn: 2.717 ± 0.049
5.719LeuPro: 5.719 ± 0.079
2.789LeuGln: 2.789 ± 0.058
7.139LeuArg: 7.139 ± 0.093
6.586LeuSer: 6.586 ± 0.086
5.92LeuThr: 5.92 ± 0.088
6.865LeuVal: 6.865 ± 0.089
1.285LeuTrp: 1.285 ± 0.035
2.062LeuTyr: 2.062 ± 0.042
0.0LeuXaa: 0.0 ± 0.0
Met
3.585MetAla: 3.585 ± 0.058
0.166MetCys: 0.166 ± 0.011
1.349MetAsp: 1.349 ± 0.037
1.385MetGlu: 1.385 ± 0.034
0.849MetPhe: 0.849 ± 0.029
2.23MetGly: 2.23 ± 0.054
0.468MetHis: 0.468 ± 0.022
1.551MetIle: 1.551 ± 0.035
1.033MetLys: 1.033 ± 0.032
2.72MetLeu: 2.72 ± 0.05
0.78MetMet: 0.78 ± 0.027
0.857MetAsn: 0.857 ± 0.029
1.493MetPro: 1.493 ± 0.035
0.911MetGln: 0.911 ± 0.03
1.949MetArg: 1.949 ± 0.046
1.66MetSer: 1.66 ± 0.037
1.984MetThr: 1.984 ± 0.039
1.85MetVal: 1.85 ± 0.047
0.247MetTrp: 0.247 ± 0.015
0.344MetTyr: 0.344 ± 0.017
0.0MetXaa: 0.0 ± 0.0
Asn
3.009AsnAla: 3.009 ± 0.051
0.224AsnCys: 0.224 ± 0.013
1.373AsnAsp: 1.373 ± 0.043
1.151AsnGlu: 1.151 ± 0.031
0.962AsnPhe: 0.962 ± 0.036
2.288AsnGly: 2.288 ± 0.047
0.454AsnHis: 0.454 ± 0.019
1.376AsnIle: 1.376 ± 0.038
0.664AsnLys: 0.664 ± 0.028
2.447AsnLeu: 2.447 ± 0.053
0.664AsnMet: 0.664 ± 0.024
0.61AsnAsn: 0.61 ± 0.025
1.83AsnPro: 1.83 ± 0.047
0.653AsnGln: 0.653 ± 0.026
1.764AsnArg: 1.764 ± 0.04
1.125AsnSer: 1.125 ± 0.032
1.356AsnThr: 1.356 ± 0.039
1.825AsnVal: 1.825 ± 0.041
0.404AsnTrp: 0.404 ± 0.02
0.625AsnTyr: 0.625 ± 0.024
0.0AsnXaa: 0.0 ± 0.0
Pro
6.449ProAla: 6.449 ± 0.102
0.371ProCys: 0.371 ± 0.017
3.828ProAsp: 3.828 ± 0.057
4.366ProGlu: 4.366 ± 0.067
2.045ProPhe: 2.045 ± 0.045
4.923ProGly: 4.923 ± 0.073
1.058ProHis: 1.058 ± 0.033
2.173ProIle: 2.173 ± 0.048
1.592ProLys: 1.592 ± 0.04
4.881ProLeu: 4.881 ± 0.069
1.26ProMet: 1.26 ± 0.035
1.186ProAsn: 1.186 ± 0.033
2.476ProPro: 2.476 ± 0.063
1.602ProGln: 1.602 ± 0.042
3.048ProArg: 3.048 ± 0.055
2.286ProSer: 2.286 ± 0.046
2.307ProThr: 2.307 ± 0.044
4.395ProVal: 4.395 ± 0.071
0.67ProTrp: 0.67 ± 0.025
1.177ProTyr: 1.177 ± 0.032
0.0ProXaa: 0.0 ± 0.0
Gln
4.089GlnAla: 4.089 ± 0.064
0.211GlnCys: 0.211 ± 0.013
1.479GlnAsp: 1.479 ± 0.036
1.633GlnGlu: 1.633 ± 0.04
1.059GlnPhe: 1.059 ± 0.034
2.535GlnGly: 2.535 ± 0.047
0.546GlnHis: 0.546 ± 0.021
1.929GlnIle: 1.929 ± 0.048
1.08GlnLys: 1.08 ± 0.029
2.625GlnLeu: 2.625 ± 0.058
1.062GlnMet: 1.062 ± 0.032
0.864GlnAsn: 0.864 ± 0.033
1.6GlnPro: 1.6 ± 0.035
1.015GlnGln: 1.015 ± 0.039
2.068GlnArg: 2.068 ± 0.047
1.679GlnSer: 1.679 ± 0.04
1.729GlnThr: 1.729 ± 0.037
2.342GlnVal: 2.342 ± 0.05
0.381GlnTrp: 0.381 ± 0.019
0.588GlnTyr: 0.588 ± 0.023
0.0GlnXaa: 0.0 ± 0.0
Arg
8.993ArgAla: 8.993 ± 0.108
0.488ArgCys: 0.488 ± 0.022
4.151ArgAsp: 4.151 ± 0.058
3.889ArgGlu: 3.889 ± 0.059
2.854ArgPhe: 2.854 ± 0.051
4.94ArgGly: 4.94 ± 0.067
1.592ArgHis: 1.592 ± 0.04
3.996ArgIle: 3.996 ± 0.056
2.351ArgLys: 2.351 ± 0.05
7.712ArgLeu: 7.712 ± 0.105
2.073ArgMet: 2.073 ± 0.043
1.813ArgAsn: 1.813 ± 0.043
3.494ArgPro: 3.494 ± 0.057
2.258ArgGln: 2.258 ± 0.049
5.297ArgArg: 5.297 ± 0.092
3.069ArgSer: 3.069 ± 0.051
2.955ArgThr: 2.955 ± 0.053
4.906ArgVal: 4.906 ± 0.077
0.898ArgTrp: 0.898 ± 0.033
1.547ArgTyr: 1.547 ± 0.041
0.0ArgXaa: 0.0 ± 0.0
Ser
5.758SerAla: 5.758 ± 0.078
0.434SerCys: 0.434 ± 0.023
3.012SerAsp: 3.012 ± 0.053
2.614SerGlu: 2.614 ± 0.05
2.251SerPhe: 2.251 ± 0.05
5.387SerGly: 5.387 ± 0.063
1.033SerHis: 1.033 ± 0.031
2.368SerIle: 2.368 ± 0.053
1.304SerLys: 1.304 ± 0.035
4.829SerLeu: 4.829 ± 0.08
1.209SerMet: 1.209 ± 0.038
1.247SerAsn: 1.247 ± 0.036
2.434SerPro: 2.434 ± 0.041
1.437SerGln: 1.437 ± 0.037
3.1SerArg: 3.1 ± 0.058
2.384SerSer: 2.384 ± 0.057
2.366SerThr: 2.366 ± 0.049
3.766SerVal: 3.766 ± 0.065
0.667SerTrp: 0.667 ± 0.025
1.283SerTyr: 1.283 ± 0.036
0.0SerXaa: 0.0 ± 0.0
Thr
6.138ThrAla: 6.138 ± 0.076
0.48ThrCys: 0.48 ± 0.023
2.992ThrAsp: 2.992 ± 0.055
2.919ThrGlu: 2.919 ± 0.055
1.915ThrPhe: 1.915 ± 0.043
5.487ThrGly: 5.487 ± 0.077
1.091ThrHis: 1.091 ± 0.033
2.705ThrIle: 2.705 ± 0.052
1.316ThrLys: 1.316 ± 0.04
6.137ThrLeu: 6.137 ± 0.078
1.246ThrMet: 1.246 ± 0.036
1.21ThrAsn: 1.21 ± 0.031
3.482ThrPro: 3.482 ± 0.056
1.452ThrGln: 1.452 ± 0.043
3.65ThrArg: 3.65 ± 0.058
2.539ThrSer: 2.539 ± 0.045
2.717ThrThr: 2.717 ± 0.059
4.197ThrVal: 4.197 ± 0.067
0.617ThrTrp: 0.617 ± 0.03
1.214ThrTyr: 1.214 ± 0.037
0.0ThrXaa: 0.0 ± 0.0
Val
9.099ValAla: 9.099 ± 0.091
0.627ValCys: 0.627 ± 0.026
4.026ValAsp: 4.026 ± 0.062
4.416ValGlu: 4.416 ± 0.074
3.043ValPhe: 3.043 ± 0.062
5.418ValGly: 5.418 ± 0.082
1.284ValHis: 1.284 ± 0.038
4.287ValIle: 4.287 ± 0.067
2.162ValLys: 2.162 ± 0.049
7.553ValLeu: 7.553 ± 0.102
2.083ValMet: 2.083 ± 0.045
1.908ValAsn: 1.908 ± 0.048
3.745ValPro: 3.745 ± 0.061
2.073ValGln: 2.073 ± 0.044
4.309ValArg: 4.309 ± 0.071
4.102ValSer: 4.102 ± 0.063
4.673ValThr: 4.673 ± 0.075
5.64ValVal: 5.64 ± 0.078
0.89ValTrp: 0.89 ± 0.029
1.46ValTyr: 1.46 ± 0.041
0.0ValXaa: 0.0 ± 0.0
Trp
1.454TrpAla: 1.454 ± 0.041
0.136TrpCys: 0.136 ± 0.013
0.707TrpAsp: 0.707 ± 0.025
0.647TrpGlu: 0.647 ± 0.026
0.511TrpPhe: 0.511 ± 0.023
1.026TrpGly: 1.026 ± 0.034
0.342TrpHis: 0.342 ± 0.02
0.647TrpIle: 0.647 ± 0.029
0.465TrpLys: 0.465 ± 0.023
1.599TrpLeu: 1.599 ± 0.043
0.386TrpMet: 0.386 ± 0.019
0.403TrpAsn: 0.403 ± 0.022
0.692TrpPro: 0.692 ± 0.027
0.568TrpGln: 0.568 ± 0.023
1.101TrpArg: 1.101 ± 0.035
0.741TrpSer: 0.741 ± 0.027
0.702TrpThr: 0.702 ± 0.027
0.915TrpVal: 0.915 ± 0.029
0.204TrpTrp: 0.204 ± 0.012
0.259TrpTyr: 0.259 ± 0.015
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.562TyrAla: 2.562 ± 0.049
0.215TyrCys: 0.215 ± 0.014
1.575TyrAsp: 1.575 ± 0.039
1.245TyrGlu: 1.245 ± 0.042
0.901TyrPhe: 0.901 ± 0.033
2.223TyrGly: 2.223 ± 0.048
0.519TyrHis: 0.519 ± 0.023
0.95TyrIle: 0.95 ± 0.028
0.6TyrLys: 0.6 ± 0.024
2.266TyrLeu: 2.266 ± 0.048
0.515TyrMet: 0.515 ± 0.021
0.633TyrAsn: 0.633 ± 0.026
1.081TyrPro: 1.081 ± 0.033
0.684TyrGln: 0.684 ± 0.023
1.553TyrArg: 1.553 ± 0.04
1.158TyrSer: 1.158 ± 0.039
1.147TyrThr: 1.147 ± 0.04
1.508TyrVal: 1.508 ± 0.044
0.323TyrTrp: 0.323 ± 0.02
0.573TyrTyr: 0.573 ± 0.024
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 3439 proteins (1042918 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