Amino acid dipepetide frequency for Firmicutes bacterium CAG:83

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
12.564AlaAla: 12.564 ± 0.206
1.679AlaCys: 1.679 ± 0.066
5.503AlaAsp: 5.503 ± 0.115
6.469AlaGlu: 6.469 ± 0.128
3.064AlaPhe: 3.064 ± 0.082
8.102AlaGly: 8.102 ± 0.151
1.632AlaHis: 1.632 ± 0.066
4.829AlaIle: 4.829 ± 0.115
3.699AlaLys: 3.699 ± 0.109
10.652AlaLeu: 10.652 ± 0.184
3.035AlaMet: 3.035 ± 0.088
2.147AlaAsn: 2.147 ± 0.074
3.454AlaPro: 3.454 ± 0.098
3.784AlaGln: 3.784 ± 0.104
4.853AlaArg: 4.853 ± 0.101
3.977AlaSer: 3.977 ± 0.096
3.786AlaThr: 3.786 ± 0.11
8.679AlaVal: 8.679 ± 0.167
0.797AlaTrp: 0.797 ± 0.037
2.827AlaTyr: 2.827 ± 0.066
0.0AlaXaa: 0.0 ± 0.0
Cys
1.655CysAla: 1.655 ± 0.066
0.388CysCys: 0.388 ± 0.029
0.98CysAsp: 0.98 ± 0.044
0.725CysGlu: 0.725 ± 0.042
0.652CysPhe: 0.652 ± 0.037
2.153CysGly: 2.153 ± 0.064
0.38CysHis: 0.38 ± 0.032
0.957CysIle: 0.957 ± 0.039
0.598CysLys: 0.598 ± 0.033
1.526CysLeu: 1.526 ± 0.057
0.423CysMet: 0.423 ± 0.031
0.378CysAsn: 0.378 ± 0.029
0.92CysPro: 0.92 ± 0.052
0.554CysGln: 0.554 ± 0.032
1.532CysArg: 1.532 ± 0.06
0.889CysSer: 0.889 ± 0.038
1.019CysThr: 1.019 ± 0.047
1.291CysVal: 1.291 ± 0.053
0.187CysTrp: 0.187 ± 0.019
0.515CysTyr: 0.515 ± 0.03
0.0CysXaa: 0.0 ± 0.0
Asp
5.194AspAla: 5.194 ± 0.111
0.947AspCys: 0.947 ± 0.047
2.726AspAsp: 2.726 ± 0.088
3.608AspGlu: 3.608 ± 0.094
2.203AspPhe: 2.203 ± 0.073
5.304AspGly: 5.304 ± 0.129
1.169AspHis: 1.169 ± 0.053
3.344AspIle: 3.344 ± 0.085
2.146AspLys: 2.146 ± 0.077
5.013AspLeu: 5.013 ± 0.109
1.615AspMet: 1.615 ± 0.057
1.43AspAsn: 1.43 ± 0.067
2.753AspPro: 2.753 ± 0.073
1.528AspGln: 1.528 ± 0.054
3.187AspArg: 3.187 ± 0.099
2.618AspSer: 2.618 ± 0.074
3.205AspThr: 3.205 ± 0.1
3.957AspVal: 3.957 ± 0.084
0.691AspTrp: 0.691 ± 0.041
2.234AspTyr: 2.234 ± 0.065
0.0AspXaa: 0.0 ± 0.0
Glu
5.918GluAla: 5.918 ± 0.132
0.72GluCys: 0.72 ± 0.043
3.664GluAsp: 3.664 ± 0.096
5.806GluGlu: 5.806 ± 0.134
1.756GluPhe: 1.756 ± 0.063
4.851GluGly: 4.851 ± 0.098
1.341GluHis: 1.341 ± 0.061
3.542GluIle: 3.542 ± 0.1
4.129GluLys: 4.129 ± 0.114
6.961GluLeu: 6.961 ± 0.132
2.153GluMet: 2.153 ± 0.067
2.701GluAsn: 2.701 ± 0.072
2.344GluPro: 2.344 ± 0.074
2.962GluGln: 2.962 ± 0.088
3.789GluArg: 3.789 ± 0.097
2.803GluSer: 2.803 ± 0.08
3.562GluThr: 3.562 ± 0.095
4.368GluVal: 4.368 ± 0.086
0.475GluTrp: 0.475 ± 0.033
2.03GluTyr: 2.03 ± 0.059
0.0GluXaa: 0.0 ± 0.0
Phe
3.203PheAla: 3.203 ± 0.083
0.747PheCys: 0.747 ± 0.039
2.283PheAsp: 2.283 ± 0.068
1.655PheGlu: 1.655 ± 0.06
1.499PhePhe: 1.499 ± 0.062
2.952PheGly: 2.952 ± 0.082
0.805PheHis: 0.805 ± 0.044
1.816PheIle: 1.816 ± 0.067
1.013PheLys: 1.013 ± 0.051
3.388PheLeu: 3.388 ± 0.093
0.83PheMet: 0.83 ± 0.038
1.038PheAsn: 1.038 ± 0.048
1.482PhePro: 1.482 ± 0.061
1.038PheGln: 1.038 ± 0.045
2.203PheArg: 2.203 ± 0.065
2.257PheSer: 2.257 ± 0.07
2.313PheThr: 2.313 ± 0.078
2.398PheVal: 2.398 ± 0.085
0.355PheTrp: 0.355 ± 0.031
1.297PheTyr: 1.297 ± 0.054
0.0PheXaa: 0.0 ± 0.0
Gly
6.822GlyAla: 6.822 ± 0.129
1.688GlyCys: 1.688 ± 0.063
4.442GlyAsp: 4.442 ± 0.119
5.159GlyGlu: 5.159 ± 0.118
3.025GlyPhe: 3.025 ± 0.075
7.289GlyGly: 7.289 ± 0.207
1.783GlyHis: 1.783 ± 0.07
4.883GlyIle: 4.883 ± 0.092
4.648GlyLys: 4.648 ± 0.108
7.864GlyLeu: 7.864 ± 0.156
2.535GlyMet: 2.535 ± 0.083
2.267GlyAsn: 2.267 ± 0.087
2.018GlyPro: 2.018 ± 0.06
3.043GlyGln: 3.043 ± 0.082
4.789GlyArg: 4.789 ± 0.103
4.615GlySer: 4.615 ± 0.107
4.934GlyThr: 4.934 ± 0.106
6.649GlyVal: 6.649 ± 0.124
0.942GlyTrp: 0.942 ± 0.043
3.085GlyTyr: 3.085 ± 0.091
0.002GlyXaa: 0.002 ± 0.002
His
1.542HisAla: 1.542 ± 0.069
0.423HisCys: 0.423 ± 0.028
1.104HisAsp: 1.104 ± 0.053
1.05HisGlu: 1.05 ± 0.048
0.751HisPhe: 0.751 ± 0.038
1.816HisGly: 1.816 ± 0.079
0.658HisHis: 0.658 ± 0.073
1.36HisIle: 1.36 ± 0.06
0.72HisLys: 0.72 ± 0.036
2.055HisLeu: 2.055 ± 0.069
0.579HisMet: 0.579 ± 0.033
0.596HisAsn: 0.596 ± 0.04
1.351HisPro: 1.351 ± 0.056
0.741HisGln: 0.741 ± 0.047
1.451HisArg: 1.451 ± 0.074
1.011HisSer: 1.011 ± 0.04
1.299HisThr: 1.299 ± 0.056
1.312HisVal: 1.312 ± 0.056
0.193HisTrp: 0.193 ± 0.019
0.756HisTyr: 0.756 ± 0.038
0.0HisXaa: 0.0 ± 0.0
Ile
5.096IleAla: 5.096 ± 0.105
1.052IleCys: 1.052 ± 0.051
2.993IleAsp: 2.993 ± 0.086
2.472IleGlu: 2.472 ± 0.075
1.881IlePhe: 1.881 ± 0.071
4.114IleGly: 4.114 ± 0.103
1.237IleHis: 1.237 ± 0.049
2.821IleIle: 2.821 ± 0.092
1.775IleLys: 1.775 ± 0.065
5.217IleLeu: 5.217 ± 0.098
1.194IleMet: 1.194 ± 0.048
1.503IleAsn: 1.503 ± 0.061
2.985IlePro: 2.985 ± 0.074
1.69IleGln: 1.69 ± 0.061
3.813IleArg: 3.813 ± 0.095
3.301IleSer: 3.301 ± 0.088
3.305IleThr: 3.305 ± 0.087
3.901IleVal: 3.901 ± 0.089
0.531IleTrp: 0.531 ± 0.034
1.648IleTyr: 1.648 ± 0.06
0.0IleXaa: 0.0 ± 0.0
Lys
3.975LysAla: 3.975 ± 0.101
0.496LysCys: 0.496 ± 0.032
2.406LysAsp: 2.406 ± 0.075
2.915LysGlu: 2.915 ± 0.078
1.131LysPhe: 1.131 ± 0.054
3.083LysGly: 3.083 ± 0.09
0.687LysHis: 0.687 ± 0.043
2.169LysIle: 2.169 ± 0.074
2.912LysLys: 2.912 ± 0.094
4.11LysLeu: 4.11 ± 0.089
1.347LysMet: 1.347 ± 0.053
1.754LysAsn: 1.754 ± 0.058
1.812LysPro: 1.812 ± 0.069
1.517LysGln: 1.517 ± 0.058
2.506LysArg: 2.506 ± 0.072
2.014LysSer: 2.014 ± 0.07
2.502LysThr: 2.502 ± 0.073
2.894LysVal: 2.894 ± 0.084
0.376LysTrp: 0.376 ± 0.027
1.565LysTyr: 1.565 ± 0.049
0.002LysXaa: 0.002 ± 0.002
Leu
9.757LeuAla: 9.757 ± 0.172
2.284LeuCys: 2.284 ± 0.071
5.003LeuAsp: 5.003 ± 0.095
6.406LeuGlu: 6.406 ± 0.137
3.444LeuPhe: 3.444 ± 0.098
7.534LeuGly: 7.534 ± 0.153
2.365LeuHis: 2.365 ± 0.075
4.337LeuIle: 4.337 ± 0.105
3.826LeuLys: 3.826 ± 0.075
12.229LeuLeu: 12.229 ± 0.282
2.884LeuMet: 2.884 ± 0.067
2.726LeuAsn: 2.726 ± 0.071
5.397LeuPro: 5.397 ± 0.127
3.267LeuGln: 3.267 ± 0.101
7.073LeuArg: 7.073 ± 0.138
6.506LeuSer: 6.506 ± 0.137
7.116LeuThr: 7.116 ± 0.13
6.795LeuVal: 6.795 ± 0.15
1.117LeuTrp: 1.117 ± 0.051
3.265LeuTyr: 3.265 ± 0.09
0.004LeuXaa: 0.004 ± 0.003
Met
3.224MetAla: 3.224 ± 0.085
0.32MetCys: 0.32 ± 0.025
1.821MetAsp: 1.821 ± 0.059
2.259MetGlu: 2.259 ± 0.072
0.729MetPhe: 0.729 ± 0.041
2.364MetGly: 2.364 ± 0.069
0.48MetHis: 0.48 ± 0.03
1.374MetIle: 1.374 ± 0.053
1.69MetLys: 1.69 ± 0.056
2.765MetLeu: 2.765 ± 0.089
0.801MetMet: 0.801 ± 0.039
1.094MetAsn: 1.094 ± 0.05
1.202MetPro: 1.202 ± 0.046
1.05MetGln: 1.05 ± 0.046
1.53MetArg: 1.53 ± 0.062
1.588MetSer: 1.588 ± 0.06
1.796MetThr: 1.796 ± 0.063
2.034MetVal: 2.034 ± 0.063
0.197MetTrp: 0.197 ± 0.023
0.7MetTyr: 0.7 ± 0.035
0.0MetXaa: 0.0 ± 0.0
Asn
2.697AsnAla: 2.697 ± 0.079
0.519AsnCys: 0.519 ± 0.032
1.513AsnAsp: 1.513 ± 0.058
1.528AsnGlu: 1.528 ± 0.053
1.036AsnPhe: 1.036 ± 0.049
2.917AsnGly: 2.917 ± 0.102
0.587AsnHis: 0.587 ± 0.037
1.746AsnIle: 1.746 ± 0.048
1.129AsnLys: 1.129 ± 0.044
2.661AsnLeu: 2.661 ± 0.072
0.874AsnMet: 0.874 ± 0.042
0.961AsnAsn: 0.961 ± 0.054
1.464AsnPro: 1.464 ± 0.057
0.884AsnGln: 0.884 ± 0.046
1.862AsnArg: 1.862 ± 0.06
1.364AsnSer: 1.364 ± 0.06
1.771AsnThr: 1.771 ± 0.065
2.092AsnVal: 2.092 ± 0.064
0.326AsnTrp: 0.326 ± 0.028
1.025AsnTyr: 1.025 ± 0.038
0.0AsnXaa: 0.0 ± 0.0
Pro
4.44ProAla: 4.44 ± 0.108
0.675ProCys: 0.675 ± 0.04
2.736ProAsp: 2.736 ± 0.076
4.434ProGlu: 4.434 ± 0.11
1.491ProPhe: 1.491 ± 0.059
3.525ProGly: 3.525 ± 0.087
0.855ProHis: 0.855 ± 0.048
1.885ProIle: 1.885 ± 0.071
1.49ProLys: 1.49 ± 0.061
3.845ProLeu: 3.845 ± 0.092
1.119ProMet: 1.119 ± 0.051
1.079ProAsn: 1.079 ± 0.05
1.451ProPro: 1.451 ± 0.071
1.866ProGln: 1.866 ± 0.061
1.893ProArg: 1.893 ± 0.061
2.045ProSer: 2.045 ± 0.074
2.205ProThr: 2.205 ± 0.071
3.867ProVal: 3.867 ± 0.092
0.496ProTrp: 0.496 ± 0.036
1.48ProTyr: 1.48 ± 0.049
0.0ProXaa: 0.0 ± 0.0
Gln
3.523GlnAla: 3.523 ± 0.081
0.432GlnCys: 0.432 ± 0.032
1.451GlnAsp: 1.451 ± 0.049
3.018GlnGlu: 3.018 ± 0.094
0.984GlnPhe: 0.984 ± 0.046
2.537GlnGly: 2.537 ± 0.074
0.72GlnHis: 0.72 ± 0.045
1.976GlnIle: 1.976 ± 0.07
1.64GlnLys: 1.64 ± 0.064
4.193GlnLeu: 4.193 ± 0.112
1.163GlnMet: 1.163 ± 0.049
1.133GlnAsn: 1.133 ± 0.046
1.542GlnPro: 1.542 ± 0.06
2.049GlnGln: 2.049 ± 0.086
2.844GlnArg: 2.844 ± 0.096
1.736GlnSer: 1.736 ± 0.059
1.97GlnThr: 1.97 ± 0.059
2.888GlnVal: 2.888 ± 0.079
0.401GlnTrp: 0.401 ± 0.031
1.233GlnTyr: 1.233 ± 0.049
0.0GlnXaa: 0.0 ± 0.0
Arg
4.366ArgAla: 4.366 ± 0.093
1.133ArgCys: 1.133 ± 0.047
3.106ArgAsp: 3.106 ± 0.091
4.683ArgGlu: 4.683 ± 0.111
2.227ArgPhe: 2.227 ± 0.062
3.838ArgGly: 3.838 ± 0.096
1.443ArgHis: 1.443 ± 0.072
3.469ArgIle: 3.469 ± 0.098
2.605ArgLys: 2.605 ± 0.075
6.662ArgLeu: 6.662 ± 0.151
2.026ArgMet: 2.026 ± 0.059
1.696ArgAsn: 1.696 ± 0.062
2.489ArgPro: 2.489 ± 0.086
3.562ArgGln: 3.562 ± 0.103
5.653ArgArg: 5.653 ± 0.132
3.402ArgSer: 3.402 ± 0.092
3.195ArgThr: 3.195 ± 0.078
3.647ArgVal: 3.647 ± 0.086
0.731ArgTrp: 0.731 ± 0.047
2.265ArgTyr: 2.265 ± 0.063
0.0ArgXaa: 0.0 ± 0.0
Ser
5.028SerAla: 5.028 ± 0.123
0.888SerCys: 0.888 ± 0.042
2.904SerAsp: 2.904 ± 0.079
2.514SerGlu: 2.514 ± 0.072
2.205SerPhe: 2.205 ± 0.074
5.381SerGly: 5.381 ± 0.112
1.165SerHis: 1.165 ± 0.05
2.769SerIle: 2.769 ± 0.077
1.848SerLys: 1.848 ± 0.062
4.959SerLeu: 4.959 ± 0.105
1.588SerMet: 1.588 ± 0.054
1.43SerAsn: 1.43 ± 0.058
2.151SerPro: 2.151 ± 0.062
1.848SerGln: 1.848 ± 0.066
3.388SerArg: 3.388 ± 0.089
2.67SerSer: 2.67 ± 0.093
2.666SerThr: 2.666 ± 0.079
4.214SerVal: 4.214 ± 0.104
0.585SerTrp: 0.585 ± 0.037
1.914SerTyr: 1.914 ± 0.048
0.0SerXaa: 0.0 ± 0.0
Thr
6.232ThrAla: 6.232 ± 0.116
0.87ThrCys: 0.87 ± 0.045
3.34ThrAsp: 3.34 ± 0.085
3.735ThrGlu: 3.735 ± 0.1
1.98ThrPhe: 1.98 ± 0.077
5.368ThrGly: 5.368 ± 0.114
1.067ThrHis: 1.067 ± 0.044
3.033ThrIle: 3.033 ± 0.095
1.762ThrLys: 1.762 ± 0.061
5.999ThrLeu: 5.999 ± 0.127
1.646ThrMet: 1.646 ± 0.057
1.397ThrAsn: 1.397 ± 0.064
2.977ThrPro: 2.977 ± 0.089
1.711ThrGln: 1.711 ± 0.059
2.587ThrArg: 2.587 ± 0.081
2.516ThrSer: 2.516 ± 0.08
2.859ThrThr: 2.859 ± 0.086
5.777ThrVal: 5.777 ± 0.154
0.59ThrTrp: 0.59 ± 0.034
1.968ThrTyr: 1.968 ± 0.07
0.004ThrXaa: 0.004 ± 0.003
Val
6.512ValAla: 6.512 ± 0.144
1.671ValCys: 1.671 ± 0.062
4.021ValAsp: 4.021 ± 0.094
4.766ValGlu: 4.766 ± 0.104
2.798ValPhe: 2.798 ± 0.087
5.549ValGly: 5.549 ± 0.12
1.376ValHis: 1.376 ± 0.059
4.034ValIle: 4.034 ± 0.111
3.035ValLys: 3.035 ± 0.098
8.314ValLeu: 8.314 ± 0.156
2.099ValMet: 2.099 ± 0.071
2.227ValAsn: 2.227 ± 0.077
3.234ValPro: 3.234 ± 0.08
2.497ValGln: 2.497 ± 0.077
4.245ValArg: 4.245 ± 0.101
4.648ValSer: 4.648 ± 0.083
5.279ValThr: 5.279 ± 0.131
5.964ValVal: 5.964 ± 0.126
0.776ValTrp: 0.776 ± 0.041
2.63ValTyr: 2.63 ± 0.073
0.0ValXaa: 0.0 ± 0.0
Trp
0.776TrpAla: 0.776 ± 0.037
0.179TrpCys: 0.179 ± 0.018
0.563TrpAsp: 0.563 ± 0.038
0.664TrpGlu: 0.664 ± 0.037
0.396TrpPhe: 0.396 ± 0.028
0.905TrpGly: 0.905 ± 0.051
0.241TrpHis: 0.241 ± 0.024
0.428TrpIle: 0.428 ± 0.03
0.426TrpLys: 0.426 ± 0.03
1.256TrpLeu: 1.256 ± 0.055
0.313TrpMet: 0.313 ± 0.027
0.353TrpAsn: 0.353 ± 0.027
0.334TrpPro: 0.334 ± 0.028
0.592TrpGln: 0.592 ± 0.04
0.706TrpArg: 0.706 ± 0.041
0.54TrpSer: 0.54 ± 0.029
0.475TrpThr: 0.475 ± 0.037
0.662TrpVal: 0.662 ± 0.035
0.154TrpTrp: 0.154 ± 0.019
0.336TrpTyr: 0.336 ± 0.026
0.0TrpXaa: 0.0 ± 0.0
Tyr
3.004TyrAla: 3.004 ± 0.065
0.612TyrCys: 0.612 ± 0.034
2.315TyrAsp: 2.315 ± 0.073
2.01TyrGlu: 2.01 ± 0.066
1.32TyrPhe: 1.32 ± 0.048
2.902TyrGly: 2.902 ± 0.08
0.774TyrHis: 0.774 ± 0.042
1.754TyrIle: 1.754 ± 0.062
1.082TyrLys: 1.082 ± 0.049
3.666TyrLeu: 3.666 ± 0.085
0.791TyrMet: 0.791 ± 0.041
1.046TyrAsn: 1.046 ± 0.043
1.515TyrPro: 1.515 ± 0.053
1.252TyrGln: 1.252 ± 0.05
2.29TyrArg: 2.29 ± 0.071
1.613TyrSer: 1.613 ± 0.052
2.159TyrThr: 2.159 ± 0.077
2.284TyrVal: 2.284 ± 0.078
0.38TyrTrp: 0.38 ± 0.027
1.353TyrTyr: 1.353 ± 0.053
0.002TyrXaa: 0.002 ± 0.002
Xaa
0.002XaaAla: 0.002 ± 0.002
0.002XaaCys: 0.002 ± 0.002
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
0.002XaaLeu: 0.002 ± 0.002
0.002XaaMet: 0.002 ± 0.002
0.0XaaAsn: 0.0 ± 0.0
0.002XaaPro: 0.002 ± 0.002
0.0XaaGln: 0.0 ± 0.0
0.002XaaArg: 0.002 ± 0.002
0.0XaaSer: 0.0 ± 0.0
0.002XaaThr: 0.002 ± 0.002
0.0XaaVal: 0.0 ± 0.0
0.0XaaTrp: 0.0 ± 0.0
0.0XaaTyr: 0.0 ± 0.0
0.023XaaXaa: 0.023 ± 0.01
Statistics based on 1718 proteins (518289 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