Amino acid dipepetide frequency for Firmicutes bacterium CAG:582

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
2.05AlaAla: 2.05 ± 0.092
0.634AlaCys: 0.634 ± 0.044
2.277AlaAsp: 2.277 ± 0.082
2.272AlaGlu: 2.272 ± 0.089
1.849AlaPhe: 1.849 ± 0.084
2.625AlaGly: 2.625 ± 0.107
0.695AlaHis: 0.695 ± 0.04
4.368AlaIle: 4.368 ± 0.111
3.784AlaLys: 3.784 ± 0.114
4.049AlaLeu: 4.049 ± 0.107
0.95AlaMet: 0.95 ± 0.053
2.676AlaAsn: 2.676 ± 0.095
0.85AlaPro: 0.85 ± 0.051
0.827AlaGln: 0.827 ± 0.049
1.661AlaArg: 1.661 ± 0.067
3.472AlaSer: 3.472 ± 0.107
2.709AlaThr: 2.709 ± 0.098
2.462AlaVal: 2.462 ± 0.081
0.183AlaTrp: 0.183 ± 0.023
2.411AlaTyr: 2.411 ± 0.081
0.0AlaXaa: 0.0 ± 0.0
Cys
0.587CysAla: 0.587 ± 0.039
0.147CysCys: 0.147 ± 0.025
0.847CysAsp: 0.847 ± 0.054
0.801CysGlu: 0.801 ± 0.046
0.538CysPhe: 0.538 ± 0.04
0.961CysGly: 0.961 ± 0.054
0.157CysHis: 0.157 ± 0.02
1.007CysIle: 1.007 ± 0.043
0.956CysLys: 0.956 ± 0.058
1.131CysLeu: 1.131 ± 0.053
0.25CysMet: 0.25 ± 0.027
0.657CysAsn: 0.657 ± 0.04
0.415CysPro: 0.415 ± 0.035
0.263CysGln: 0.263 ± 0.024
0.281CysArg: 0.281 ± 0.033
0.85CysSer: 0.85 ± 0.053
0.608CysThr: 0.608 ± 0.052
0.832CysVal: 0.832 ± 0.046
0.044CysTrp: 0.044 ± 0.01
0.559CysTyr: 0.559 ± 0.041
0.0CysXaa: 0.0 ± 0.0
Asp
3.024AspAla: 3.024 ± 0.088
0.61AspCys: 0.61 ± 0.043
3.982AspAsp: 3.982 ± 0.129
5.901AspGlu: 5.901 ± 0.141
2.957AspPhe: 2.957 ± 0.091
3.181AspGly: 3.181 ± 0.105
0.634AspHis: 0.634 ± 0.039
6.39AspIle: 6.39 ± 0.132
6.194AspLys: 6.194 ± 0.136
5.656AspLeu: 5.656 ± 0.134
1.419AspMet: 1.419 ± 0.073
4.057AspAsn: 4.057 ± 0.114
1.18AspPro: 1.18 ± 0.056
0.873AspGln: 0.873 ± 0.059
1.617AspArg: 1.617 ± 0.066
3.521AspSer: 3.521 ± 0.08
3.039AspThr: 3.039 ± 0.084
3.938AspVal: 3.938 ± 0.099
0.294AspTrp: 0.294 ± 0.027
3.964AspTyr: 3.964 ± 0.109
0.0AspXaa: 0.0 ± 0.0
Glu
3.232GluAla: 3.232 ± 0.099
0.796GluCys: 0.796 ± 0.044
3.887GluAsp: 3.887 ± 0.112
6.617GluGlu: 6.617 ± 0.166
3.235GluPhe: 3.235 ± 0.108
2.506GluGly: 2.506 ± 0.081
0.966GluHis: 0.966 ± 0.047
6.799GluIle: 6.799 ± 0.142
7.75GluLys: 7.75 ± 0.146
7.044GluLeu: 7.044 ± 0.164
1.839GluMet: 1.839 ± 0.076
5.921GluAsn: 5.921 ± 0.15
1.192GluPro: 1.192 ± 0.057
1.548GluGln: 1.548 ± 0.066
2.292GluArg: 2.292 ± 0.08
4.126GluSer: 4.126 ± 0.098
3.884GluThr: 3.884 ± 0.114
4.409GluVal: 4.409 ± 0.113
0.325GluTrp: 0.325 ± 0.033
4.402GluTyr: 4.402 ± 0.113
0.0GluXaa: 0.0 ± 0.0
Phe
1.978PheAla: 1.978 ± 0.082
0.515PheCys: 0.515 ± 0.046
3.351PheAsp: 3.351 ± 0.103
2.864PheGlu: 2.864 ± 0.092
1.978PhePhe: 1.978 ± 0.086
2.377PheGly: 2.377 ± 0.091
0.549PheHis: 0.549 ± 0.042
5.015PheIle: 5.015 ± 0.141
4.206PheLys: 4.206 ± 0.112
3.892PheLeu: 3.892 ± 0.144
1.015PheMet: 1.015 ± 0.052
3.377PheAsn: 3.377 ± 0.093
0.94PhePro: 0.94 ± 0.055
0.798PheGln: 0.798 ± 0.045
1.167PheArg: 1.167 ± 0.055
3.194PheSer: 3.194 ± 0.085
2.292PheThr: 2.292 ± 0.082
2.753PheVal: 2.753 ± 0.091
0.191PheTrp: 0.191 ± 0.02
2.261PheTyr: 2.261 ± 0.093
0.0PheXaa: 0.0 ± 0.0
Gly
2.563GlyAla: 2.563 ± 0.108
0.749GlyCys: 0.749 ± 0.042
2.697GlyAsp: 2.697 ± 0.088
3.451GlyGlu: 3.451 ± 0.105
2.341GlyPhe: 2.341 ± 0.065
3.614GlyGly: 3.614 ± 0.328
0.865GlyHis: 0.865 ± 0.048
5.131GlyIle: 5.131 ± 0.127
4.682GlyLys: 4.682 ± 0.125
4.286GlyLeu: 4.286 ± 0.108
1.151GlyMet: 1.151 ± 0.056
3.304GlyAsn: 3.304 ± 0.116
0.86GlyPro: 0.86 ± 0.1
0.801GlyGln: 0.801 ± 0.05
1.612GlyArg: 1.612 ± 0.085
3.59GlySer: 3.59 ± 0.13
3.037GlyThr: 3.037 ± 0.128
3.65GlyVal: 3.65 ± 0.105
0.371GlyTrp: 0.371 ± 0.042
3.328GlyTyr: 3.328 ± 0.122
0.0GlyXaa: 0.0 ± 0.0
His
0.634HisAla: 0.634 ± 0.044
0.113HisCys: 0.113 ± 0.02
0.896HisAsp: 0.896 ± 0.045
1.043HisGlu: 1.043 ± 0.059
0.695HisPhe: 0.695 ± 0.049
0.84HisGly: 0.84 ± 0.049
0.304HisHis: 0.304 ± 0.027
1.272HisIle: 1.272 ± 0.061
1.007HisLys: 1.007 ± 0.049
1.218HisLeu: 1.218 ± 0.043
0.294HisMet: 0.294 ± 0.027
0.863HisAsn: 0.863 ± 0.049
0.469HisPro: 0.469 ± 0.034
0.265HisGln: 0.265 ± 0.027
0.453HisArg: 0.453 ± 0.034
0.734HisSer: 0.734 ± 0.045
0.711HisThr: 0.711 ± 0.04
0.842HisVal: 0.842 ± 0.047
0.067HisTrp: 0.067 ± 0.013
0.685HisTyr: 0.685 ± 0.04
0.0HisXaa: 0.0 ± 0.0
Ile
4.275IleAla: 4.275 ± 0.093
1.231IleCys: 1.231 ± 0.054
6.988IleAsp: 6.988 ± 0.147
6.727IleGlu: 6.727 ± 0.146
4.371IlePhe: 4.371 ± 0.136
4.721IleGly: 4.721 ± 0.12
1.231IleHis: 1.231 ± 0.066
9.857IleIle: 9.857 ± 0.198
9.617IleLys: 9.617 ± 0.185
9.164IleLeu: 9.164 ± 0.212
2.145IleMet: 2.145 ± 0.079
7.673IleAsn: 7.673 ± 0.142
2.712IlePro: 2.712 ± 0.084
1.605IleGln: 1.605 ± 0.086
2.854IleArg: 2.854 ± 0.098
6.975IleSer: 6.975 ± 0.15
5.197IleThr: 5.197 ± 0.147
6.05IleVal: 6.05 ± 0.137
0.433IleTrp: 0.433 ± 0.031
4.543IleTyr: 4.543 ± 0.118
0.0IleXaa: 0.0 ± 0.0
Lys
3.294LysAla: 3.294 ± 0.089
1.198LysCys: 1.198 ± 0.055
6.315LysAsp: 6.315 ± 0.138
8.571LysGlu: 8.571 ± 0.17
3.284LysPhe: 3.284 ± 0.099
3.724LysGly: 3.724 ± 0.097
1.226LysHis: 1.226 ± 0.063
9.074LysIle: 9.074 ± 0.168
10.454LysLys: 10.454 ± 0.231
7.66LysLeu: 7.66 ± 0.149
2.82LysMet: 2.82 ± 0.082
8.566LysAsn: 8.566 ± 0.158
1.669LysPro: 1.669 ± 0.076
2.037LysGln: 2.037 ± 0.071
3.516LysArg: 3.516 ± 0.1
5.875LysSer: 5.875 ± 0.133
5.669LysThr: 5.669 ± 0.148
5.993LysVal: 5.993 ± 0.12
0.456LysTrp: 0.456 ± 0.036
6.207LysTyr: 6.207 ± 0.147
0.003LysXaa: 0.003 ± 0.002
Leu
3.933LeuAla: 3.933 ± 0.12
1.038LeuCys: 1.038 ± 0.06
5.597LeuAsp: 5.597 ± 0.123
6.287LeuGlu: 6.287 ± 0.14
4.317LeuPhe: 4.317 ± 0.145
4.726LeuGly: 4.726 ± 0.135
1.084LeuHis: 1.084 ± 0.058
8.383LeuIle: 8.383 ± 0.168
9.282LeuLys: 9.282 ± 0.184
8.172LeuLeu: 8.172 ± 0.225
2.112LeuMet: 2.112 ± 0.084
6.949LeuAsn: 6.949 ± 0.149
2.297LeuPro: 2.297 ± 0.073
1.494LeuGln: 1.494 ± 0.074
2.63LeuArg: 2.63 ± 0.085
6.872LeuSer: 6.872 ± 0.139
5.236LeuThr: 5.236 ± 0.124
5.625LeuVal: 5.625 ± 0.137
0.41LeuTrp: 0.41 ± 0.035
3.905LeuTyr: 3.905 ± 0.106
0.0LeuXaa: 0.0 ± 0.0
Met
0.943MetAla: 0.943 ± 0.047
0.247MetCys: 0.247 ± 0.027
1.548MetAsp: 1.548 ± 0.072
1.679MetGlu: 1.679 ± 0.066
1.087MetPhe: 1.087 ± 0.054
1.053MetGly: 1.053 ± 0.056
0.337MetHis: 0.337 ± 0.031
2.202MetIle: 2.202 ± 0.077
2.655MetLys: 2.655 ± 0.089
2.125MetLeu: 2.125 ± 0.078
0.734MetMet: 0.734 ± 0.049
1.903MetAsn: 1.903 ± 0.072
0.577MetPro: 0.577 ± 0.037
0.52MetGln: 0.52 ± 0.037
0.788MetArg: 0.788 ± 0.046
1.638MetSer: 1.638 ± 0.068
1.107MetThr: 1.107 ± 0.053
1.262MetVal: 1.262 ± 0.057
0.139MetTrp: 0.139 ± 0.019
1.084MetTyr: 1.084 ± 0.05
0.0MetXaa: 0.0 ± 0.0
Asn
2.921AsnAla: 2.921 ± 0.092
0.76AsnCys: 0.76 ± 0.05
4.585AsnAsp: 4.585 ± 0.113
5.422AsnGlu: 5.422 ± 0.129
3.016AsnPhe: 3.016 ± 0.088
4.396AsnGly: 4.396 ± 0.146
1.115AsnHis: 1.115 ± 0.054
7.77AsnIle: 7.77 ± 0.128
7.32AsnLys: 7.32 ± 0.158
6.158AsnLeu: 6.158 ± 0.152
1.945AsnMet: 1.945 ± 0.075
5.885AsnAsn: 5.885 ± 0.142
2.099AsnPro: 2.099 ± 0.082
1.623AsnGln: 1.623 ± 0.072
1.988AsnArg: 1.988 ± 0.074
4.412AsnSer: 4.412 ± 0.107
3.485AsnThr: 3.485 ± 0.105
4.399AsnVal: 4.399 ± 0.119
0.361AsnTrp: 0.361 ± 0.034
4.425AsnTyr: 4.425 ± 0.125
0.0AsnXaa: 0.0 ± 0.0
Pro
0.956ProAla: 0.956 ± 0.052
0.25ProCys: 0.25 ± 0.029
1.239ProAsp: 1.239 ± 0.066
1.821ProGlu: 1.821 ± 0.085
1.208ProPhe: 1.208 ± 0.059
1.025ProGly: 1.025 ± 0.055
0.343ProHis: 0.343 ± 0.034
2.248ProIle: 2.248 ± 0.085
2.037ProLys: 2.037 ± 0.079
1.857ProLeu: 1.857 ± 0.077
0.518ProMet: 0.518 ± 0.036
1.584ProAsn: 1.584 ± 0.062
0.368ProPro: 0.368 ± 0.028
0.495ProGln: 0.495 ± 0.035
0.641ProArg: 0.641 ± 0.04
1.504ProSer: 1.504 ± 0.062
1.561ProThr: 1.561 ± 0.101
1.484ProVal: 1.484 ± 0.067
0.162ProTrp: 0.162 ± 0.021
1.208ProTyr: 1.208 ± 0.054
0.0ProXaa: 0.0 ± 0.0
Gln
1.02GlnAla: 1.02 ± 0.049
0.1GlnCys: 0.1 ± 0.018
1.133GlnAsp: 1.133 ± 0.059
1.584GlnGlu: 1.584 ± 0.067
0.708GlnPhe: 0.708 ± 0.038
0.956GlnGly: 0.956 ± 0.095
0.193GlnHis: 0.193 ± 0.023
1.775GlnIle: 1.775 ± 0.071
1.883GlnLys: 1.883 ± 0.077
1.499GlnLeu: 1.499 ± 0.068
0.572GlnMet: 0.572 ± 0.041
1.473GlnAsn: 1.473 ± 0.068
0.358GlnPro: 0.358 ± 0.038
0.428GlnGln: 0.428 ± 0.034
0.701GlnArg: 0.701 ± 0.048
1.105GlnSer: 1.105 ± 0.053
1.272GlnThr: 1.272 ± 0.062
1.2GlnVal: 1.2 ± 0.052
0.085GlnTrp: 0.085 ± 0.016
0.945GlnTyr: 0.945 ± 0.049
0.0GlnXaa: 0.0 ± 0.0
Arg
1.18ArgAla: 1.18 ± 0.061
0.402ArgCys: 0.402 ± 0.03
1.726ArgAsp: 1.726 ± 0.078
2.362ArgGlu: 2.362 ± 0.082
1.229ArgPhe: 1.229 ± 0.065
1.429ArgGly: 1.429 ± 0.063
0.5ArgHis: 0.5 ± 0.039
3.134ArgIle: 3.134 ± 0.091
3.15ArgLys: 3.15 ± 0.105
2.818ArgLeu: 2.818 ± 0.094
0.847ArgMet: 0.847 ± 0.049
2.274ArgAsn: 2.274 ± 0.075
0.693ArgPro: 0.693 ± 0.047
0.688ArgGln: 0.688 ± 0.046
1.198ArgArg: 1.198 ± 0.061
1.553ArgSer: 1.553 ± 0.063
1.486ArgThr: 1.486 ± 0.065
1.996ArgVal: 1.996 ± 0.082
0.162ArgTrp: 0.162 ± 0.023
1.63ArgTyr: 1.63 ± 0.074
0.0ArgXaa: 0.0 ± 0.0
Ser
2.658SerAla: 2.658 ± 0.079
0.853SerCys: 0.853 ± 0.05
3.809SerAsp: 3.809 ± 0.089
4.105SerGlu: 4.105 ± 0.102
3.395SerPhe: 3.395 ± 0.111
4.026SerGly: 4.026 ± 0.176
0.863SerHis: 0.863 ± 0.042
6.903SerIle: 6.903 ± 0.152
6.622SerLys: 6.622 ± 0.131
6.774SerLeu: 6.774 ± 0.142
1.561SerMet: 1.561 ± 0.069
4.507SerAsn: 4.507 ± 0.139
1.314SerPro: 1.314 ± 0.064
1.208SerGln: 1.208 ± 0.056
1.88SerArg: 1.88 ± 0.065
5.187SerSer: 5.187 ± 0.157
3.699SerThr: 3.699 ± 0.117
3.933SerVal: 3.933 ± 0.114
0.433SerTrp: 0.433 ± 0.033
3.415SerTyr: 3.415 ± 0.103
0.0SerXaa: 0.0 ± 0.0
Thr
2.2ThrAla: 2.2 ± 0.097
0.796ThrCys: 0.796 ± 0.059
3.325ThrAsp: 3.325 ± 0.096
3.047ThrGlu: 3.047 ± 0.1
2.743ThrPhe: 2.743 ± 0.1
3.371ThrGly: 3.371 ± 0.162
0.827ThrHis: 0.827 ± 0.046
5.723ThrIle: 5.723 ± 0.133
4.924ThrLys: 4.924 ± 0.124
5.499ThrLeu: 5.499 ± 0.141
0.979ThrMet: 0.979 ± 0.067
3.639ThrAsn: 3.639 ± 0.114
1.597ThrPro: 1.597 ± 0.075
1.038ThrGln: 1.038 ± 0.06
1.569ThrArg: 1.569 ± 0.062
4.229ThrSer: 4.229 ± 0.124
3.802ThrThr: 3.802 ± 0.161
2.916ThrVal: 2.916 ± 0.113
0.309ThrTrp: 0.309 ± 0.031
3.011ThrTyr: 3.011 ± 0.131
0.0ThrXaa: 0.0 ± 0.0
Val
2.797ValAla: 2.797 ± 0.107
0.737ValCys: 0.737 ± 0.045
4.286ValAsp: 4.286 ± 0.108
4.095ValGlu: 4.095 ± 0.132
2.774ValPhe: 2.774 ± 0.089
3.377ValGly: 3.377 ± 0.103
0.701ValHis: 0.701 ± 0.045
5.973ValIle: 5.973 ± 0.133
5.427ValLys: 5.427 ± 0.136
5.692ValLeu: 5.692 ± 0.126
1.311ValMet: 1.311 ± 0.069
4.232ValAsn: 4.232 ± 0.106
1.556ValPro: 1.556 ± 0.058
1.025ValGln: 1.025 ± 0.051
1.854ValArg: 1.854 ± 0.08
4.597ValSer: 4.597 ± 0.119
3.637ValThr: 3.637 ± 0.117
4.33ValVal: 4.33 ± 0.127
0.34ValTrp: 0.34 ± 0.032
2.921ValTyr: 2.921 ± 0.09
0.0ValXaa: 0.0 ± 0.0
Trp
0.196TrpAla: 0.196 ± 0.023
0.103TrpCys: 0.103 ± 0.017
0.306TrpAsp: 0.306 ± 0.03
0.265TrpGlu: 0.265 ± 0.027
0.252TrpPhe: 0.252 ± 0.024
0.294TrpGly: 0.294 ± 0.036
0.059TrpHis: 0.059 ± 0.013
0.489TrpIle: 0.489 ± 0.039
0.443TrpLys: 0.443 ± 0.033
0.52TrpLeu: 0.52 ± 0.036
0.126TrpMet: 0.126 ± 0.018
0.415TrpAsn: 0.415 ± 0.037
0.095TrpPro: 0.095 ± 0.018
0.09TrpGln: 0.09 ± 0.015
0.137TrpArg: 0.137 ± 0.018
0.325TrpSer: 0.325 ± 0.034
0.227TrpThr: 0.227 ± 0.032
0.299TrpVal: 0.299 ± 0.028
0.082TrpTrp: 0.082 ± 0.016
0.345TrpTyr: 0.345 ± 0.033
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.364TyrAla: 2.364 ± 0.08
0.61TyrCys: 0.61 ± 0.042
3.637TyrAsp: 3.637 ± 0.1
3.856TyrGlu: 3.856 ± 0.123
2.733TyrPhe: 2.733 ± 0.093
2.882TyrGly: 2.882 ± 0.09
0.757TyrHis: 0.757 ± 0.05
4.855TyrIle: 4.855 ± 0.125
5.218TyrLys: 5.218 ± 0.134
5.136TyrLeu: 5.136 ± 0.139
1.041TyrMet: 1.041 ± 0.055
4.131TyrAsn: 4.131 ± 0.123
1.267TyrPro: 1.267 ± 0.062
1.365TyrGln: 1.365 ± 0.059
1.617TyrArg: 1.617 ± 0.066
3.384TyrSer: 3.384 ± 0.102
2.885TyrThr: 2.885 ± 0.128
3.286TyrVal: 3.286 ± 0.102
0.224TyrTrp: 0.224 ± 0.022
3.243TyrTyr: 3.243 ± 0.121
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
0.003XaaPhe: 0.003 ± 0.002
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
0.005XaaXaa: 0.005 ± 0.005
Statistics based on 1293 proteins (388265 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