Amino acid dipepetide frequency for Clostridium sp. CAG:628

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
1.419AlaAla: 1.419 ± 0.096
0.447AlaCys: 0.447 ± 0.045
1.753AlaAsp: 1.753 ± 0.083
1.703AlaGlu: 1.703 ± 0.094
1.769AlaPhe: 1.769 ± 0.082
2.163AlaGly: 2.163 ± 0.108
0.525AlaHis: 0.525 ± 0.041
3.179AlaIle: 3.179 ± 0.109
3.547AlaLys: 3.547 ± 0.125
3.722AlaLeu: 3.722 ± 0.12
0.781AlaMet: 0.781 ± 0.049
2.282AlaAsn: 2.282 ± 0.097
0.841AlaPro: 0.841 ± 0.054
0.563AlaGln: 0.563 ± 0.05
1.522AlaArg: 1.522 ± 0.075
3.138AlaSer: 3.138 ± 0.112
1.972AlaThr: 1.972 ± 0.1
2.294AlaVal: 2.294 ± 0.092
0.206AlaTrp: 0.206 ± 0.026
1.922AlaTyr: 1.922 ± 0.074
0.0AlaXaa: 0.0 ± 0.0
Cys
0.488CysAla: 0.488 ± 0.039
0.113CysCys: 0.113 ± 0.022
0.816CysAsp: 0.816 ± 0.203
0.753CysGlu: 0.753 ± 0.057
0.425CysPhe: 0.425 ± 0.037
0.838CysGly: 0.838 ± 0.057
0.138CysHis: 0.138 ± 0.023
0.853CysIle: 0.853 ± 0.043
0.947CysLys: 0.947 ± 0.053
0.956CysLeu: 0.956 ± 0.059
0.253CysMet: 0.253 ± 0.031
0.681CysAsn: 0.681 ± 0.054
0.434CysPro: 0.434 ± 0.054
0.131CysGln: 0.131 ± 0.023
0.203CysArg: 0.203 ± 0.023
0.678CysSer: 0.678 ± 0.049
0.631CysThr: 0.631 ± 0.054
0.666CysVal: 0.666 ± 0.049
0.047CysTrp: 0.047 ± 0.011
0.497CysTyr: 0.497 ± 0.046
0.0CysXaa: 0.0 ± 0.0
Asp
2.453AspAla: 2.453 ± 0.095
0.369AspCys: 0.369 ± 0.039
2.691AspAsp: 2.691 ± 0.117
4.51AspGlu: 4.51 ± 0.118
2.797AspPhe: 2.797 ± 0.104
3.125AspGly: 3.125 ± 0.191
0.475AspHis: 0.475 ± 0.039
6.082AspIle: 6.082 ± 0.189
6.635AspLys: 6.635 ± 0.209
5.548AspLeu: 5.548 ± 0.145
1.513AspMet: 1.513 ± 0.066
4.432AspAsn: 4.432 ± 0.115
1.063AspPro: 1.063 ± 0.068
0.578AspGln: 0.578 ± 0.044
1.619AspArg: 1.619 ± 0.064
3.016AspSer: 3.016 ± 0.105
3.163AspThr: 3.163 ± 0.121
3.682AspVal: 3.682 ± 0.107
0.263AspTrp: 0.263 ± 0.032
3.66AspTyr: 3.66 ± 0.104
0.0AspXaa: 0.0 ± 0.0
Glu
2.753GluAla: 2.753 ± 0.107
0.728GluCys: 0.728 ± 0.05
3.926GluAsp: 3.926 ± 0.11
6.87GluGlu: 6.87 ± 0.181
3.141GluPhe: 3.141 ± 0.115
3.072GluGly: 3.072 ± 0.116
0.7GluHis: 0.7 ± 0.05
6.948GluIle: 6.948 ± 0.164
7.242GluLys: 7.242 ± 0.167
7.335GluLeu: 7.335 ± 0.178
1.966GluMet: 1.966 ± 0.079
5.738GluAsn: 5.738 ± 0.138
1.185GluPro: 1.185 ± 0.07
1.256GluGln: 1.256 ± 0.063
2.319GluArg: 2.319 ± 0.112
4.522GluSer: 4.522 ± 0.137
3.654GluThr: 3.654 ± 0.109
5.301GluVal: 5.301 ± 0.136
0.363GluTrp: 0.363 ± 0.034
4.129GluTyr: 4.129 ± 0.117
0.0GluXaa: 0.0 ± 0.0
Phe
1.563PheAla: 1.563 ± 0.078
0.409PheCys: 0.409 ± 0.04
2.963PheAsp: 2.963 ± 0.096
2.441PheGlu: 2.441 ± 0.083
1.647PhePhe: 1.647 ± 0.085
2.369PheGly: 2.369 ± 0.107
0.484PheHis: 0.484 ± 0.033
4.394PheIle: 4.394 ± 0.132
4.388PheLys: 4.388 ± 0.131
3.963PheLeu: 3.963 ± 0.124
1.131PheMet: 1.131 ± 0.066
3.747PheAsn: 3.747 ± 0.118
1.053PhePro: 1.053 ± 0.055
0.603PheGln: 0.603 ± 0.044
1.075PheArg: 1.075 ± 0.064
2.882PheSer: 2.882 ± 0.092
2.528PheThr: 2.528 ± 0.1
2.716PheVal: 2.716 ± 0.103
0.247PheTrp: 0.247 ± 0.027
2.2PheTyr: 2.2 ± 0.088
0.0PheXaa: 0.0 ± 0.0
Gly
2.178GlyAla: 2.178 ± 0.101
0.659GlyCys: 0.659 ± 0.053
2.578GlyAsp: 2.578 ± 0.105
3.379GlyGlu: 3.379 ± 0.109
2.416GlyPhe: 2.416 ± 0.092
3.294GlyGly: 3.294 ± 0.239
0.828GlyHis: 0.828 ± 0.054
5.251GlyIle: 5.251 ± 0.132
5.266GlyLys: 5.266 ± 0.146
4.679GlyLeu: 4.679 ± 0.116
1.116GlyMet: 1.116 ± 0.067
3.019GlyAsn: 3.019 ± 0.148
0.813GlyPro: 0.813 ± 0.054
0.906GlyGln: 0.906 ± 0.048
1.685GlyArg: 1.685 ± 0.082
4.169GlySer: 4.169 ± 0.177
3.197GlyThr: 3.197 ± 0.14
4.041GlyVal: 4.041 ± 0.096
0.309GlyTrp: 0.309 ± 0.034
3.157GlyTyr: 3.157 ± 0.124
0.0GlyXaa: 0.0 ± 0.0
His
0.597HisAla: 0.597 ± 0.047
0.116HisCys: 0.116 ± 0.02
0.659HisAsp: 0.659 ± 0.047
0.841HisGlu: 0.841 ± 0.057
0.484HisPhe: 0.484 ± 0.045
0.7HisGly: 0.7 ± 0.049
0.181HisHis: 0.181 ± 0.027
1.035HisIle: 1.035 ± 0.06
0.969HisLys: 0.969 ± 0.051
1.091HisLeu: 1.091 ± 0.062
0.231HisMet: 0.231 ± 0.026
0.719HisAsn: 0.719 ± 0.038
0.478HisPro: 0.478 ± 0.044
0.231HisGln: 0.231 ± 0.027
0.353HisArg: 0.353 ± 0.033
0.572HisSer: 0.572 ± 0.045
0.675HisThr: 0.675 ± 0.042
0.753HisVal: 0.753 ± 0.046
0.075HisTrp: 0.075 ± 0.016
0.653HisTyr: 0.653 ± 0.044
0.0HisXaa: 0.0 ± 0.0
Ile
3.275IleAla: 3.275 ± 0.11
1.169IleCys: 1.169 ± 0.059
6.229IleAsp: 6.229 ± 0.157
6.407IleGlu: 6.407 ± 0.156
3.847IlePhe: 3.847 ± 0.139
4.838IleGly: 4.838 ± 0.14
0.96IleHis: 0.96 ± 0.055
9.698IleIle: 9.698 ± 0.252
10.029IleLys: 10.029 ± 0.168
9.464IleLeu: 9.464 ± 0.256
2.022IleMet: 2.022 ± 0.083
8.661IleAsn: 8.661 ± 0.194
2.678IlePro: 2.678 ± 0.086
1.175IleGln: 1.175 ± 0.067
2.7IleArg: 2.7 ± 0.106
7.179IleSer: 7.179 ± 0.172
5.863IleThr: 5.863 ± 0.154
6.338IleVal: 6.338 ± 0.157
0.325IleTrp: 0.325 ± 0.038
4.438IleTyr: 4.438 ± 0.129
0.0IleXaa: 0.0 ± 0.0
Lys
2.86LysAla: 2.86 ± 0.107
1.166LysCys: 1.166 ± 0.103
6.563LysAsp: 6.563 ± 0.165
10.908LysGlu: 10.908 ± 0.218
3.413LysPhe: 3.413 ± 0.108
4.641LysGly: 4.641 ± 0.13
1.016LysHis: 1.016 ± 0.056
8.77LysIle: 8.77 ± 0.191
9.958LysLys: 9.958 ± 0.238
8.517LysLeu: 8.517 ± 0.196
2.804LysMet: 2.804 ± 0.104
8.185LysAsn: 8.185 ± 0.192
1.91LysPro: 1.91 ± 0.091
1.903LysGln: 1.903 ± 0.087
3.338LysArg: 3.338 ± 0.104
6.045LysSer: 6.045 ± 0.146
5.676LysThr: 5.676 ± 0.136
6.723LysVal: 6.723 ± 0.151
0.525LysTrp: 0.525 ± 0.04
6.216LysTyr: 6.216 ± 0.155
0.0LysXaa: 0.0 ± 0.0
Leu
3.579LeuAla: 3.579 ± 0.104
0.919LeuCys: 0.919 ± 0.057
5.698LeuAsp: 5.698 ± 0.151
6.723LeuGlu: 6.723 ± 0.157
4.216LeuPhe: 4.216 ± 0.154
4.929LeuGly: 4.929 ± 0.142
1.0LeuHis: 1.0 ± 0.057
9.358LeuIle: 9.358 ± 0.237
9.373LeuLys: 9.373 ± 0.205
8.97LeuLeu: 8.97 ± 0.251
2.422LeuMet: 2.422 ± 0.079
7.363LeuAsn: 7.363 ± 0.161
2.453LeuPro: 2.453 ± 0.084
1.316LeuGln: 1.316 ± 0.063
2.603LeuArg: 2.603 ± 0.09
7.429LeuSer: 7.429 ± 0.177
5.791LeuThr: 5.791 ± 0.168
6.185LeuVal: 6.185 ± 0.129
0.409LeuTrp: 0.409 ± 0.033
4.038LeuTyr: 4.038 ± 0.121
0.0LeuXaa: 0.0 ± 0.0
Met
0.916MetAla: 0.916 ± 0.058
0.303MetCys: 0.303 ± 0.029
1.375MetAsp: 1.375 ± 0.062
1.65MetGlu: 1.65 ± 0.068
1.21MetPhe: 1.21 ± 0.061
1.375MetGly: 1.375 ± 0.064
0.328MetHis: 0.328 ± 0.035
1.96MetIle: 1.96 ± 0.083
2.691MetLys: 2.691 ± 0.102
2.119MetLeu: 2.119 ± 0.092
0.506MetMet: 0.506 ± 0.046
2.041MetAsn: 2.041 ± 0.075
0.641MetPro: 0.641 ± 0.048
0.384MetGln: 0.384 ± 0.038
0.697MetArg: 0.697 ± 0.048
1.741MetSer: 1.741 ± 0.079
1.269MetThr: 1.269 ± 0.073
1.191MetVal: 1.191 ± 0.067
0.131MetTrp: 0.131 ± 0.022
1.36MetTyr: 1.36 ± 0.069
0.0MetXaa: 0.0 ± 0.0
Asn
2.722AsnAla: 2.722 ± 0.1
0.778AsnCys: 0.778 ± 0.127
4.616AsnAsp: 4.616 ± 0.152
5.907AsnGlu: 5.907 ± 0.133
2.972AsnPhe: 2.972 ± 0.092
4.169AsnGly: 4.169 ± 0.165
0.788AsnHis: 0.788 ± 0.045
8.307AsnIle: 8.307 ± 0.196
8.942AsnLys: 8.942 ± 0.208
7.042AsnLeu: 7.042 ± 0.156
2.028AsnMet: 2.028 ± 0.081
6.854AsnAsn: 6.854 ± 0.215
1.778AsnPro: 1.778 ± 0.081
1.144AsnGln: 1.144 ± 0.065
2.125AsnArg: 2.125 ± 0.092
4.694AsnSer: 4.694 ± 0.144
4.438AsnThr: 4.438 ± 0.149
4.582AsnVal: 4.582 ± 0.146
0.378AsnTrp: 0.378 ± 0.037
4.579AsnTyr: 4.579 ± 0.144
0.0AsnXaa: 0.0 ± 0.0
Pro
0.781ProAla: 0.781 ± 0.048
0.231ProCys: 0.231 ± 0.028
1.085ProAsp: 1.085 ± 0.064
1.791ProGlu: 1.791 ± 0.091
1.291ProPhe: 1.291 ± 0.067
1.291ProGly: 1.291 ± 0.069
0.397ProHis: 0.397 ± 0.04
2.122ProIle: 2.122 ± 0.083
2.119ProLys: 2.119 ± 0.083
2.141ProLeu: 2.141 ± 0.086
0.466ProMet: 0.466 ± 0.037
1.656ProAsn: 1.656 ± 0.07
0.422ProPro: 0.422 ± 0.042
0.35ProGln: 0.35 ± 0.034
0.591ProArg: 0.591 ± 0.045
1.625ProSer: 1.625 ± 0.076
1.538ProThr: 1.538 ± 0.084
1.781ProVal: 1.781 ± 0.095
0.184ProTrp: 0.184 ± 0.024
1.369ProTyr: 1.369 ± 0.075
0.0ProXaa: 0.0 ± 0.0
Gln
0.778GlnAla: 0.778 ± 0.057
0.106GlnCys: 0.106 ± 0.017
0.806GlnAsp: 0.806 ± 0.048
1.238GlnGlu: 1.238 ± 0.072
0.409GlnPhe: 0.409 ± 0.034
0.75GlnGly: 0.75 ± 0.053
0.141GlnHis: 0.141 ± 0.024
1.728GlnIle: 1.728 ± 0.077
1.553GlnLys: 1.553 ± 0.081
1.26GlnLeu: 1.26 ± 0.072
0.463GlnMet: 0.463 ± 0.036
1.131GlnAsn: 1.131 ± 0.053
0.259GlnPro: 0.259 ± 0.029
0.259GlnGln: 0.259 ± 0.028
0.594GlnArg: 0.594 ± 0.049
0.866GlnSer: 0.866 ± 0.054
0.919GlnThr: 0.919 ± 0.054
1.228GlnVal: 1.228 ± 0.066
0.059GlnTrp: 0.059 ± 0.015
0.788GlnTyr: 0.788 ± 0.049
0.0GlnXaa: 0.0 ± 0.0
Arg
0.941ArgAla: 0.941 ± 0.054
0.369ArgCys: 0.369 ± 0.03
1.685ArgAsp: 1.685 ± 0.077
2.275ArgGlu: 2.275 ± 0.097
1.225ArgPhe: 1.225 ± 0.06
1.435ArgGly: 1.435 ± 0.073
0.409ArgHis: 0.409 ± 0.035
2.913ArgIle: 2.913 ± 0.107
2.944ArgLys: 2.944 ± 0.092
2.622ArgLeu: 2.622 ± 0.091
0.831ArgMet: 0.831 ± 0.051
2.247ArgAsn: 2.247 ± 0.09
0.772ArgPro: 0.772 ± 0.057
0.694ArgGln: 0.694 ± 0.05
1.088ArgArg: 1.088 ± 0.064
1.853ArgSer: 1.853 ± 0.069
1.663ArgThr: 1.663 ± 0.068
2.141ArgVal: 2.141 ± 0.088
0.172ArgTrp: 0.172 ± 0.025
1.388ArgTyr: 1.388 ± 0.067
0.0ArgXaa: 0.0 ± 0.0
Ser
2.25SerAla: 2.25 ± 0.113
0.613SerCys: 0.613 ± 0.047
3.838SerAsp: 3.838 ± 0.111
4.798SerGlu: 4.798 ± 0.133
3.169SerPhe: 3.169 ± 0.116
3.997SerGly: 3.997 ± 0.144
0.859SerHis: 0.859 ± 0.048
7.101SerIle: 7.101 ± 0.18
6.763SerLys: 6.763 ± 0.154
7.079SerLeu: 7.079 ± 0.192
1.469SerMet: 1.469 ± 0.06
5.301SerAsn: 5.301 ± 0.173
1.45SerPro: 1.45 ± 0.073
0.997SerGln: 0.997 ± 0.055
1.913SerArg: 1.913 ± 0.077
5.107SerSer: 5.107 ± 0.153
4.038SerThr: 4.038 ± 0.147
4.469SerVal: 4.469 ± 0.142
0.406SerTrp: 0.406 ± 0.036
3.869SerTyr: 3.869 ± 0.127
0.0SerXaa: 0.0 ± 0.0
Thr
1.888ThrAla: 1.888 ± 0.101
0.697ThrCys: 0.697 ± 0.053
3.219ThrAsp: 3.219 ± 0.106
3.447ThrGlu: 3.447 ± 0.121
2.641ThrPhe: 2.641 ± 0.086
3.479ThrGly: 3.479 ± 0.116
0.759ThrHis: 0.759 ± 0.055
5.51ThrIle: 5.51 ± 0.142
5.423ThrLys: 5.423 ± 0.131
6.066ThrLeu: 6.066 ± 0.14
1.031ThrMet: 1.031 ± 0.061
4.698ThrAsn: 4.698 ± 0.17
1.907ThrPro: 1.907 ± 0.093
0.8ThrGln: 0.8 ± 0.053
1.644ThrArg: 1.644 ± 0.07
4.579ThrSer: 4.579 ± 0.146
3.419ThrThr: 3.419 ± 0.129
3.072ThrVal: 3.072 ± 0.146
0.338ThrTrp: 0.338 ± 0.033
3.007ThrTyr: 3.007 ± 0.115
0.0ThrXaa: 0.0 ± 0.0
Val
2.097ValAla: 2.097 ± 0.096
0.763ValCys: 0.763 ± 0.056
3.679ValAsp: 3.679 ± 0.114
3.697ValGlu: 3.697 ± 0.126
2.985ValPhe: 2.985 ± 0.123
3.497ValGly: 3.497 ± 0.095
0.744ValHis: 0.744 ± 0.051
6.495ValIle: 6.495 ± 0.166
6.22ValLys: 6.22 ± 0.175
6.257ValLeu: 6.257 ± 0.146
1.5ValMet: 1.5 ± 0.071
5.207ValAsn: 5.207 ± 0.142
1.697ValPro: 1.697 ± 0.08
0.944ValGln: 0.944 ± 0.052
1.994ValArg: 1.994 ± 0.077
5.485ValSer: 5.485 ± 0.161
3.872ValThr: 3.872 ± 0.123
4.491ValVal: 4.491 ± 0.126
0.334ValTrp: 0.334 ± 0.027
3.1ValTyr: 3.1 ± 0.107
0.0ValXaa: 0.0 ± 0.0
Trp
0.213TrpAla: 0.213 ± 0.026
0.091TrpCys: 0.091 ± 0.016
0.334TrpAsp: 0.334 ± 0.033
0.297TrpGlu: 0.297 ± 0.031
0.269TrpPhe: 0.269 ± 0.029
0.297TrpGly: 0.297 ± 0.035
0.053TrpHis: 0.053 ± 0.014
0.416TrpIle: 0.416 ± 0.04
0.422TrpLys: 0.422 ± 0.04
0.478TrpLeu: 0.478 ± 0.043
0.144TrpMet: 0.144 ± 0.024
0.375TrpAsn: 0.375 ± 0.039
0.116TrpPro: 0.116 ± 0.022
0.072TrpGln: 0.072 ± 0.016
0.169TrpArg: 0.169 ± 0.023
0.303TrpSer: 0.303 ± 0.029
0.244TrpThr: 0.244 ± 0.033
0.316TrpVal: 0.316 ± 0.028
0.072TrpTrp: 0.072 ± 0.015
0.441TrpTyr: 0.441 ± 0.039
0.0TrpXaa: 0.0 ± 0.0
Tyr
1.997TyrAla: 1.997 ± 0.081
0.503TyrCys: 0.503 ± 0.044
3.16TyrAsp: 3.16 ± 0.118
3.516TyrGlu: 3.516 ± 0.105
2.478TyrPhe: 2.478 ± 0.094
2.682TyrGly: 2.682 ± 0.126
0.628TyrHis: 0.628 ± 0.038
5.179TyrIle: 5.179 ± 0.151
5.704TyrLys: 5.704 ± 0.152
5.466TyrLeu: 5.466 ± 0.146
1.206TyrMet: 1.206 ± 0.082
4.507TyrAsn: 4.507 ± 0.142
1.281TyrPro: 1.281 ± 0.059
1.028TyrGln: 1.028 ± 0.065
1.435TyrArg: 1.435 ± 0.064
3.604TyrSer: 3.604 ± 0.122
3.072TyrThr: 3.072 ± 0.113
3.088TyrVal: 3.088 ± 0.104
0.275TyrTrp: 0.275 ± 0.029
3.447TyrTyr: 3.447 ± 0.124
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 1091 proteins (319958 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