Amino acid dipepetide frequency for bacterium K02(2017)

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
4.954AlaAla: 4.954 ± 0.155
0.652AlaCys: 0.652 ± 0.049
3.421AlaAsp: 3.421 ± 0.103
3.702AlaGlu: 3.702 ± 0.116
2.618AlaPhe: 2.618 ± 0.095
4.352AlaGly: 4.352 ± 0.152
1.227AlaHis: 1.227 ± 0.061
5.822AlaIle: 5.822 ± 0.303
4.974AlaLys: 4.974 ± 0.143
6.437AlaLeu: 6.437 ± 0.166
1.431AlaMet: 1.431 ± 0.072
3.481AlaAsn: 3.481 ± 0.109
1.981AlaPro: 1.981 ± 0.076
2.518AlaGln: 2.518 ± 0.087
2.093AlaArg: 2.093 ± 0.076
4.222AlaSer: 4.222 ± 0.118
3.889AlaThr: 3.889 ± 0.289
4.357AlaVal: 4.357 ± 0.236
0.605AlaTrp: 0.605 ± 0.045
2.204AlaTyr: 2.204 ± 0.093
0.002AlaXaa: 0.002 ± 0.002
Cys
0.562CysAla: 0.562 ± 0.042
0.179CysCys: 0.179 ± 0.024
0.627CysAsp: 0.627 ± 0.049
0.62CysGlu: 0.62 ± 0.039
0.495CysPhe: 0.495 ± 0.038
0.796CysGly: 0.796 ± 0.046
0.271CysHis: 0.271 ± 0.03
0.607CysIle: 0.607 ± 0.044
0.5CysLys: 0.5 ± 0.039
1.237CysLeu: 1.237 ± 0.058
0.142CysMet: 0.142 ± 0.019
0.463CysAsn: 0.463 ± 0.034
0.455CysPro: 0.455 ± 0.041
0.505CysGln: 0.505 ± 0.041
0.343CysArg: 0.343 ± 0.031
0.717CysSer: 0.717 ± 0.048
0.48CysThr: 0.48 ± 0.041
0.47CysVal: 0.47 ± 0.034
0.134CysTrp: 0.134 ± 0.024
0.368CysTyr: 0.368 ± 0.033
0.0CysXaa: 0.0 ± 0.0
Asp
3.578AspAla: 3.578 ± 0.105
0.625AspCys: 0.625 ± 0.041
3.439AspAsp: 3.439 ± 0.142
3.645AspGlu: 3.645 ± 0.143
2.914AspPhe: 2.914 ± 0.103
4.15AspGly: 4.15 ± 0.23
1.194AspHis: 1.194 ± 0.066
5.27AspIle: 5.27 ± 0.431
4.13AspLys: 4.13 ± 0.126
6.161AspLeu: 6.161 ± 0.146
1.05AspMet: 1.05 ± 0.056
2.879AspAsn: 2.879 ± 0.139
2.135AspPro: 2.135 ± 0.082
2.759AspGln: 2.759 ± 0.098
2.043AspArg: 2.043 ± 0.071
3.531AspSer: 3.531 ± 0.11
2.68AspThr: 2.68 ± 0.095
3.6AspVal: 3.6 ± 0.102
0.572AspTrp: 0.572 ± 0.035
2.394AspTyr: 2.394 ± 0.086
0.0AspXaa: 0.0 ± 0.0
Glu
3.949GluAla: 3.949 ± 0.12
0.423GluCys: 0.423 ± 0.037
3.098GluAsp: 3.098 ± 0.126
3.202GluGlu: 3.202 ± 0.128
2.747GluPhe: 2.747 ± 0.095
3.108GluGly: 3.108 ± 0.11
1.06GluHis: 1.06 ± 0.05
5.297GluIle: 5.297 ± 0.296
4.252GluLys: 4.252 ± 0.152
6.088GluLeu: 6.088 ± 0.144
1.331GluMet: 1.331 ± 0.058
3.712GluAsn: 3.712 ± 0.104
1.563GluPro: 1.563 ± 0.06
2.15GluGln: 2.15 ± 0.089
2.132GluArg: 2.132 ± 0.092
4.115GluSer: 4.115 ± 0.123
3.531GluThr: 3.531 ± 0.247
3.498GluVal: 3.498 ± 0.108
0.567GluTrp: 0.567 ± 0.039
1.961GluTyr: 1.961 ± 0.071
0.0GluXaa: 0.0 ± 0.0
Phe
2.573PheAla: 2.573 ± 0.094
0.615PheCys: 0.615 ± 0.043
3.098PheAsp: 3.098 ± 0.1
2.926PheGlu: 2.926 ± 0.097
2.366PhePhe: 2.366 ± 0.092
2.973PheGly: 2.973 ± 0.106
0.779PheHis: 0.779 ± 0.044
3.742PheIle: 3.742 ± 0.128
3.752PheLys: 3.752 ± 0.114
4.451PheLeu: 4.451 ± 0.149
1.115PheMet: 1.115 ± 0.049
3.016PheAsn: 3.016 ± 0.089
1.545PhePro: 1.545 ± 0.06
1.396PheGln: 1.396 ± 0.068
1.53PheArg: 1.53 ± 0.067
3.697PheSer: 3.697 ± 0.112
2.598PheThr: 2.598 ± 0.098
2.513PheVal: 2.513 ± 0.089
0.54PheTrp: 0.54 ± 0.041
1.896PheTyr: 1.896 ± 0.094
0.0PheXaa: 0.0 ± 0.0
Gly
4.695GlyAla: 4.695 ± 0.247
0.674GlyCys: 0.674 ± 0.044
3.73GlyAsp: 3.73 ± 0.144
3.088GlyGlu: 3.088 ± 0.118
2.956GlyPhe: 2.956 ± 0.101
4.426GlyGly: 4.426 ± 0.16
1.306GlyHis: 1.306 ± 0.07
5.011GlyIle: 5.011 ± 0.13
4.202GlyLys: 4.202 ± 0.128
6.133GlyLeu: 6.133 ± 0.163
1.503GlyMet: 1.503 ± 0.065
3.093GlyAsn: 3.093 ± 0.141
1.652GlyPro: 1.652 ± 0.081
2.314GlyGln: 2.314 ± 0.079
2.227GlyArg: 2.227 ± 0.093
4.419GlySer: 4.419 ± 0.189
4.11GlyThr: 4.11 ± 0.23
4.504GlyVal: 4.504 ± 0.137
0.565GlyTrp: 0.565 ± 0.046
2.326GlyTyr: 2.326 ± 0.093
0.0GlyXaa: 0.0 ± 0.0
His
1.229HisAla: 1.229 ± 0.06
0.224HisCys: 0.224 ± 0.024
1.112HisAsp: 1.112 ± 0.05
1.015HisGlu: 1.015 ± 0.055
1.291HisPhe: 1.291 ± 0.062
1.14HisGly: 1.14 ± 0.058
0.682HisHis: 0.682 ± 0.044
1.48HisIle: 1.48 ± 0.065
1.209HisLys: 1.209 ± 0.064
2.336HisLeu: 2.336 ± 0.098
0.361HisMet: 0.361 ± 0.033
0.908HisAsn: 0.908 ± 0.05
1.067HisPro: 1.067 ± 0.06
1.14HisGln: 1.14 ± 0.065
0.801HisArg: 0.801 ± 0.05
1.217HisSer: 1.217 ± 0.068
0.975HisThr: 0.975 ± 0.051
1.145HisVal: 1.145 ± 0.06
0.179HisTrp: 0.179 ± 0.02
0.858HisTyr: 0.858 ± 0.053
0.0HisXaa: 0.0 ± 0.0
Ile
5.342IleAla: 5.342 ± 0.241
0.824IleCys: 0.824 ± 0.057
5.68IleAsp: 5.68 ± 0.206
4.889IleGlu: 4.889 ± 0.125
3.573IlePhe: 3.573 ± 0.1
4.849IleGly: 4.849 ± 0.135
1.411IleHis: 1.411 ± 0.056
6.029IleIle: 6.029 ± 0.162
7.126IleLys: 7.126 ± 0.172
8.186IleLeu: 8.186 ± 0.522
1.344IleMet: 1.344 ± 0.06
5.603IleAsn: 5.603 ± 0.161
3.254IlePro: 3.254 ± 0.106
3.053IleGln: 3.053 ± 0.099
2.627IleArg: 2.627 ± 0.092
5.805IleSer: 5.805 ± 0.178
4.347IleThr: 4.347 ± 0.163
4.193IleVal: 4.193 ± 0.106
0.677IleTrp: 0.677 ± 0.04
2.67IleTyr: 2.67 ± 0.11
0.0IleXaa: 0.0 ± 0.0
Lys
4.713LysAla: 4.713 ± 0.144
0.627LysCys: 0.627 ± 0.043
4.444LysAsp: 4.444 ± 0.133
5.031LysGlu: 5.031 ± 0.156
2.859LysPhe: 2.859 ± 0.107
3.767LysGly: 3.767 ± 0.134
1.53LysHis: 1.53 ± 0.077
6.984LysIle: 6.984 ± 0.142
7.484LysLys: 7.484 ± 0.222
7.119LysLeu: 7.119 ± 0.173
1.861LysMet: 1.861 ± 0.075
5.223LysAsn: 5.223 ± 0.146
2.6LysPro: 2.6 ± 0.096
3.048LysGln: 3.048 ± 0.115
2.981LysArg: 2.981 ± 0.101
5.136LysSer: 5.136 ± 0.159
4.232LysThr: 4.232 ± 0.13
4.382LysVal: 4.382 ± 0.131
0.654LysTrp: 0.654 ± 0.04
2.513LysTyr: 2.513 ± 0.097
0.0LysXaa: 0.0 ± 0.0
Leu
6.877LeuAla: 6.877 ± 0.21
0.936LeuCys: 0.936 ± 0.052
5.653LeuAsp: 5.653 ± 0.135
5.683LeuGlu: 5.683 ± 0.144
4.824LeuPhe: 4.824 ± 0.155
6.151LeuGly: 6.151 ± 0.149
1.548LeuHis: 1.548 ± 0.063
7.551LeuIle: 7.551 ± 0.197
8.94LeuLys: 8.94 ± 0.241
8.922LeuLeu: 8.922 ± 0.27
2.045LeuMet: 2.045 ± 0.073
7.32LeuAsn: 7.32 ± 0.277
3.862LeuPro: 3.862 ± 0.113
2.958LeuGln: 2.958 ± 0.089
3.252LeuArg: 3.252 ± 0.093
7.733LeuSer: 7.733 ± 0.174
5.342LeuThr: 5.342 ± 0.155
5.392LeuVal: 5.392 ± 0.139
0.766LeuTrp: 0.766 ± 0.049
3.12LeuTyr: 3.12 ± 0.112
0.0LeuXaa: 0.0 ± 0.0
Met
1.764MetAla: 1.764 ± 0.074
0.164MetCys: 0.164 ± 0.019
1.177MetAsp: 1.177 ± 0.062
0.886MetGlu: 0.886 ± 0.054
0.727MetPhe: 0.727 ± 0.045
1.762MetGly: 1.762 ± 0.077
0.406MetHis: 0.406 ± 0.03
1.662MetIle: 1.662 ± 0.079
1.244MetLys: 1.244 ± 0.056
1.851MetLeu: 1.851 ± 0.071
0.547MetMet: 0.547 ± 0.041
0.978MetAsn: 0.978 ± 0.046
1.04MetPro: 1.04 ± 0.055
0.96MetGln: 0.96 ± 0.048
0.809MetArg: 0.809 ± 0.045
1.625MetSer: 1.625 ± 0.069
1.309MetThr: 1.309 ± 0.069
1.441MetVal: 1.441 ± 0.062
0.152MetTrp: 0.152 ± 0.017
0.525MetTyr: 0.525 ± 0.035
0.0MetXaa: 0.0 ± 0.0
Asn
3.125AsnAla: 3.125 ± 0.099
0.617AsnCys: 0.617 ± 0.048
3.245AsnAsp: 3.245 ± 0.114
4.061AsnGlu: 4.061 ± 0.328
2.662AsnPhe: 2.662 ± 0.084
3.715AsnGly: 3.715 ± 0.149
1.301AsnHis: 1.301 ± 0.059
4.81AsnIle: 4.81 ± 0.15
4.722AsnLys: 4.722 ± 0.148
6.079AsnLeu: 6.079 ± 0.135
1.187AsnMet: 1.187 ± 0.055
4.028AsnAsn: 4.028 ± 0.192
2.553AsnPro: 2.553 ± 0.098
2.924AsnGln: 2.924 ± 0.095
2.105AsnArg: 2.105 ± 0.076
3.899AsnSer: 3.899 ± 0.141
3.317AsnThr: 3.317 ± 0.151
2.941AsnVal: 2.941 ± 0.082
0.667AsnTrp: 0.667 ± 0.045
2.267AsnTyr: 2.267 ± 0.095
0.0AsnXaa: 0.0 ± 0.0
Pro
2.172ProAla: 2.172 ± 0.085
0.289ProCys: 0.289 ± 0.028
2.366ProAsp: 2.366 ± 0.088
2.466ProGlu: 2.466 ± 0.072
1.769ProPhe: 1.769 ± 0.071
1.913ProGly: 1.913 ± 0.073
0.821ProHis: 0.821 ± 0.055
2.789ProIle: 2.789 ± 0.093
2.702ProLys: 2.702 ± 0.112
3.379ProLeu: 3.379 ± 0.091
0.732ProMet: 0.732 ± 0.044
2.197ProAsn: 2.197 ± 0.09
1.082ProPro: 1.082 ± 0.071
1.789ProGln: 1.789 ± 0.079
1.055ProArg: 1.055 ± 0.052
2.284ProSer: 2.284 ± 0.075
1.976ProThr: 1.976 ± 0.07
2.294ProVal: 2.294 ± 0.08
0.351ProTrp: 0.351 ± 0.037
1.279ProTyr: 1.279 ± 0.057
0.0ProXaa: 0.0 ± 0.0
Gln
2.864GlnAla: 2.864 ± 0.092
0.363GlnCys: 0.363 ± 0.033
2.142GlnAsp: 2.142 ± 0.08
2.331GlnGlu: 2.331 ± 0.085
1.729GlnPhe: 1.729 ± 0.069
2.005GlnGly: 2.005 ± 0.077
0.804GlnHis: 0.804 ± 0.044
3.411GlnIle: 3.411 ± 0.093
3.692GlnLys: 3.692 ± 0.107
3.593GlnLeu: 3.593 ± 0.108
0.941GlnMet: 0.941 ± 0.046
2.904GlnAsn: 2.904 ± 0.109
1.164GlnPro: 1.164 ± 0.068
1.782GlnGln: 1.782 ± 0.08
1.329GlnArg: 1.329 ± 0.062
2.802GlnSer: 2.802 ± 0.09
2.329GlnThr: 2.329 ± 0.084
2.202GlnVal: 2.202 ± 0.076
0.299GlnTrp: 0.299 ± 0.026
1.194GlnTyr: 1.194 ± 0.057
0.0GlnXaa: 0.0 ± 0.0
Arg
2.03ArgAla: 2.03 ± 0.086
0.316ArgCys: 0.316 ± 0.028
1.981ArgAsp: 1.981 ± 0.089
1.891ArgGlu: 1.891 ± 0.072
1.943ArgPhe: 1.943 ± 0.069
1.986ArgGly: 1.986 ± 0.079
0.863ArgHis: 0.863 ± 0.057
2.705ArgIle: 2.705 ± 0.083
2.314ArgLys: 2.314 ± 0.104
3.832ArgLeu: 3.832 ± 0.116
0.831ArgMet: 0.831 ± 0.047
1.602ArgAsn: 1.602 ± 0.073
1.207ArgPro: 1.207 ± 0.054
1.336ArgGln: 1.336 ± 0.069
1.416ArgArg: 1.416 ± 0.078
2.488ArgSer: 2.488 ± 0.089
1.57ArgThr: 1.57 ± 0.069
2.244ArgVal: 2.244 ± 0.082
0.333ArgTrp: 0.333 ± 0.029
1.538ArgTyr: 1.538 ± 0.071
0.0ArgXaa: 0.0 ± 0.0
Ser
4.073SerAla: 4.073 ± 0.124
0.779SerCys: 0.779 ± 0.05
3.944SerAsp: 3.944 ± 0.15
3.792SerGlu: 3.792 ± 0.111
3.949SerPhe: 3.949 ± 0.105
4.613SerGly: 4.613 ± 0.141
1.612SerHis: 1.612 ± 0.059
5.715SerIle: 5.715 ± 0.152
4.944SerLys: 4.944 ± 0.123
7.335SerLeu: 7.335 ± 0.152
1.543SerMet: 1.543 ± 0.073
3.969SerAsn: 3.969 ± 0.126
2.473SerPro: 2.473 ± 0.088
2.891SerGln: 2.891 ± 0.083
2.341SerArg: 2.341 ± 0.091
5.058SerSer: 5.058 ± 0.16
3.904SerThr: 3.904 ± 0.169
4.11SerVal: 4.11 ± 0.13
0.729SerTrp: 0.729 ± 0.046
2.491SerTyr: 2.491 ± 0.087
0.0SerXaa: 0.0 ± 0.0
Thr
3.998ThrAla: 3.998 ± 0.197
0.552ThrCys: 0.552 ± 0.042
3.314ThrAsp: 3.314 ± 0.152
2.993ThrGlu: 2.993 ± 0.097
2.304ThrPhe: 2.304 ± 0.097
4.394ThrGly: 4.394 ± 0.288
1.254ThrHis: 1.254 ± 0.06
5.036ThrIle: 5.036 ± 0.31
3.585ThrLys: 3.585 ± 0.11
5.121ThrLeu: 5.121 ± 0.13
0.821ThrMet: 0.821 ± 0.044
3.25ThrAsn: 3.25 ± 0.123
2.344ThrPro: 2.344 ± 0.077
2.232ThrGln: 2.232 ± 0.081
1.592ThrArg: 1.592 ± 0.064
3.976ThrSer: 3.976 ± 0.167
3.349ThrThr: 3.349 ± 0.125
3.113ThrVal: 3.113 ± 0.116
0.453ThrTrp: 0.453 ± 0.034
1.801ThrTyr: 1.801 ± 0.073
0.0ThrXaa: 0.0 ± 0.0
Val
3.971ValAla: 3.971 ± 0.114
0.612ValCys: 0.612 ± 0.041
3.588ValAsp: 3.588 ± 0.12
3.404ValGlu: 3.404 ± 0.11
2.749ValPhe: 2.749 ± 0.102
4.188ValGly: 4.188 ± 0.149
1.067ValHis: 1.067 ± 0.051
4.389ValIle: 4.389 ± 0.119
4.374ValLys: 4.374 ± 0.129
5.812ValLeu: 5.812 ± 0.14
1.376ValMet: 1.376 ± 0.064
3.267ValAsn: 3.267 ± 0.11
1.976ValPro: 1.976 ± 0.077
1.864ValGln: 1.864 ± 0.068
1.916ValArg: 1.916 ± 0.079
4.541ValSer: 4.541 ± 0.105
3.342ValThr: 3.342 ± 0.143
3.966ValVal: 3.966 ± 0.107
0.478ValTrp: 0.478 ± 0.033
1.983ValTyr: 1.983 ± 0.075
0.0ValXaa: 0.0 ± 0.0
Trp
0.58TrpAla: 0.58 ± 0.046
0.077TrpCys: 0.077 ± 0.012
0.669TrpAsp: 0.669 ± 0.042
0.515TrpGlu: 0.515 ± 0.035
0.45TrpPhe: 0.45 ± 0.039
0.667TrpGly: 0.667 ± 0.045
0.239TrpHis: 0.239 ± 0.027
0.617TrpIle: 0.617 ± 0.044
0.503TrpLys: 0.503 ± 0.039
0.891TrpLeu: 0.891 ± 0.053
0.244TrpMet: 0.244 ± 0.025
0.485TrpAsn: 0.485 ± 0.038
0.368TrpPro: 0.368 ± 0.03
0.42TrpGln: 0.42 ± 0.032
0.328TrpArg: 0.328 ± 0.031
0.542TrpSer: 0.542 ± 0.032
0.505TrpThr: 0.505 ± 0.044
0.669TrpVal: 0.669 ± 0.045
0.119TrpTrp: 0.119 ± 0.017
0.378TrpTyr: 0.378 ± 0.036
0.0TrpXaa: 0.0 ± 0.0
Tyr
1.891TyrAla: 1.891 ± 0.08
0.425TyrCys: 0.425 ± 0.031
2.023TyrAsp: 2.023 ± 0.081
1.645TyrGlu: 1.645 ± 0.07
2.195TyrPhe: 2.195 ± 0.089
1.981TyrGly: 1.981 ± 0.08
0.995TyrHis: 0.995 ± 0.057
2.553TyrIle: 2.553 ± 0.101
2.535TyrLys: 2.535 ± 0.097
3.914TyrLeu: 3.914 ± 0.13
0.62TyrMet: 0.62 ± 0.038
1.846TyrAsn: 1.846 ± 0.079
1.383TyrPro: 1.383 ± 0.067
1.841TyrGln: 1.841 ± 0.069
1.505TyrArg: 1.505 ± 0.076
2.458TyrSer: 2.458 ± 0.083
1.699TyrThr: 1.699 ± 0.082
1.829TyrVal: 1.829 ± 0.072
0.428TyrTrp: 0.428 ± 0.035
1.675TyrTyr: 1.675 ± 0.087
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
0.002XaaMet: 0.002 ± 0.002
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
0.002XaaXaa: 0.002 ± 0.002
Statistics based on 1213 proteins (401908 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