Amino acid dipepetide frequency for Clostridium sp. CAG:417

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
2.304AlaAla: 2.304 ± 0.115
0.561AlaCys: 0.561 ± 0.037
2.062AlaAsp: 2.062 ± 0.071
2.372AlaGlu: 2.372 ± 0.095
1.91AlaPhe: 1.91 ± 0.068
2.592AlaGly: 2.592 ± 0.097
0.755AlaHis: 0.755 ± 0.044
4.602AlaIle: 4.602 ± 0.119
4.214AlaLys: 4.214 ± 0.104
4.429AlaLeu: 4.429 ± 0.12
1.127AlaMet: 1.127 ± 0.063
2.534AlaAsn: 2.534 ± 0.086
1.051AlaPro: 1.051 ± 0.061
1.025AlaGln: 1.025 ± 0.051
1.706AlaArg: 1.706 ± 0.074
2.943AlaSer: 2.943 ± 0.093
2.733AlaThr: 2.733 ± 0.096
2.636AlaVal: 2.636 ± 0.089
0.244AlaTrp: 0.244 ± 0.022
2.081AlaTyr: 2.081 ± 0.071
0.0AlaXaa: 0.0 ± 0.0
Cys
0.446CysAla: 0.446 ± 0.032
0.231CysCys: 0.231 ± 0.028
0.818CysAsp: 0.818 ± 0.052
0.608CysGlu: 0.608 ± 0.045
0.503CysPhe: 0.503 ± 0.037
0.862CysGly: 0.862 ± 0.049
0.233CysHis: 0.233 ± 0.022
0.867CysIle: 0.867 ± 0.051
0.886CysLys: 0.886 ± 0.056
1.059CysLeu: 1.059 ± 0.059
0.283CysMet: 0.283 ± 0.03
0.791CysAsn: 0.791 ± 0.048
0.419CysPro: 0.419 ± 0.036
0.265CysGln: 0.265 ± 0.026
0.406CysArg: 0.406 ± 0.036
1.033CysSer: 1.033 ± 0.055
0.519CysThr: 0.519 ± 0.04
0.658CysVal: 0.658 ± 0.044
0.079CysTrp: 0.079 ± 0.015
0.592CysTyr: 0.592 ± 0.043
0.0CysXaa: 0.0 ± 0.0
Asp
2.555AspAla: 2.555 ± 0.087
0.634AspCys: 0.634 ± 0.042
3.886AspAsp: 3.886 ± 0.137
4.707AspGlu: 4.707 ± 0.135
2.783AspPhe: 2.783 ± 0.097
3.197AspGly: 3.197 ± 0.103
0.642AspHis: 0.642 ± 0.043
6.274AspIle: 6.274 ± 0.127
6.256AspLys: 6.256 ± 0.136
5.506AspLeu: 5.506 ± 0.106
1.491AspMet: 1.491 ± 0.071
4.618AspAsn: 4.618 ± 0.113
1.224AspPro: 1.224 ± 0.058
1.122AspGln: 1.122 ± 0.054
1.612AspArg: 1.612 ± 0.074
3.803AspSer: 3.803 ± 0.116
3.208AspThr: 3.208 ± 0.107
3.682AspVal: 3.682 ± 0.105
0.294AspTrp: 0.294 ± 0.024
3.559AspTyr: 3.559 ± 0.095
0.0AspXaa: 0.0 ± 0.0
Glu
3.066GluAla: 3.066 ± 0.12
0.632GluCys: 0.632 ± 0.047
4.073GluAsp: 4.073 ± 0.115
6.693GluGlu: 6.693 ± 0.191
2.804GluPhe: 2.804 ± 0.084
2.712GluGly: 2.712 ± 0.076
0.896GluHis: 0.896 ± 0.048
6.617GluIle: 6.617 ± 0.145
8.169GluLys: 8.169 ± 0.158
6.683GluLeu: 6.683 ± 0.174
1.701GluMet: 1.701 ± 0.067
5.506GluAsn: 5.506 ± 0.134
1.101GluPro: 1.101 ± 0.057
2.086GluGln: 2.086 ± 0.095
2.416GluArg: 2.416 ± 0.084
3.365GluSer: 3.365 ± 0.1
3.019GluThr: 3.019 ± 0.1
4.447GluVal: 4.447 ± 0.117
0.385GluTrp: 0.385 ± 0.034
3.514GluTyr: 3.514 ± 0.106
0.0GluXaa: 0.0 ± 0.0
Phe
1.91PheAla: 1.91 ± 0.068
0.558PheCys: 0.558 ± 0.039
3.022PheAsp: 3.022 ± 0.095
2.435PheGlu: 2.435 ± 0.083
2.01PhePhe: 2.01 ± 0.085
2.356PheGly: 2.356 ± 0.082
0.545PheHis: 0.545 ± 0.037
4.24PheIle: 4.24 ± 0.135
3.737PheLys: 3.737 ± 0.082
4.251PheLeu: 4.251 ± 0.124
0.97PheMet: 0.97 ± 0.049
3.066PheAsn: 3.066 ± 0.096
1.061PhePro: 1.061 ± 0.052
0.943PheGln: 0.943 ± 0.05
1.143PheArg: 1.143 ± 0.05
3.37PheSer: 3.37 ± 0.102
2.516PheThr: 2.516 ± 0.079
2.427PheVal: 2.427 ± 0.088
0.22PheTrp: 0.22 ± 0.024
2.162PheTyr: 2.162 ± 0.073
0.0PheXaa: 0.0 ± 0.0
Gly
2.579GlyAla: 2.579 ± 0.096
0.763GlyCys: 0.763 ± 0.05
2.94GlyAsp: 2.94 ± 0.093
3.213GlyGlu: 3.213 ± 0.099
2.372GlyPhe: 2.372 ± 0.093
3.058GlyGly: 3.058 ± 0.12
0.915GlyHis: 0.915 ± 0.054
5.047GlyIle: 5.047 ± 0.129
4.903GlyLys: 4.903 ± 0.103
4.358GlyLeu: 4.358 ± 0.108
1.344GlyMet: 1.344 ± 0.059
3.263GlyAsn: 3.263 ± 0.105
0.959GlyPro: 0.959 ± 0.065
1.2GlyGln: 1.2 ± 0.057
1.876GlyArg: 1.876 ± 0.083
3.153GlySer: 3.153 ± 0.104
2.99GlyThr: 2.99 ± 0.099
3.53GlyVal: 3.53 ± 0.112
0.314GlyTrp: 0.314 ± 0.035
2.838GlyTyr: 2.838 ± 0.09
0.0GlyXaa: 0.0 ± 0.0
His
0.647HisAla: 0.647 ± 0.042
0.16HisCys: 0.16 ± 0.025
0.757HisAsp: 0.757 ± 0.049
0.904HisGlu: 0.904 ± 0.056
0.668HisPhe: 0.668 ± 0.045
0.799HisGly: 0.799 ± 0.049
0.328HisHis: 0.328 ± 0.031
1.268HisIle: 1.268 ± 0.064
1.088HisLys: 1.088 ± 0.051
1.347HisLeu: 1.347 ± 0.059
0.278HisMet: 0.278 ± 0.028
0.941HisAsn: 0.941 ± 0.057
0.516HisPro: 0.516 ± 0.038
0.393HisGln: 0.393 ± 0.038
0.529HisArg: 0.529 ± 0.038
0.818HisSer: 0.818 ± 0.049
0.77HisThr: 0.77 ± 0.039
0.789HisVal: 0.789 ± 0.048
0.066HisTrp: 0.066 ± 0.012
0.726HisTyr: 0.726 ± 0.042
0.0HisXaa: 0.0 ± 0.0
Ile
4.335IleAla: 4.335 ± 0.117
1.271IleCys: 1.271 ± 0.059
6.463IleAsp: 6.463 ± 0.141
6.24IleGlu: 6.24 ± 0.159
4.083IlePhe: 4.083 ± 0.149
4.665IleGly: 4.665 ± 0.13
1.164IleHis: 1.164 ± 0.059
10.042IleIle: 10.042 ± 0.246
9.293IleLys: 9.293 ± 0.183
9.188IleLeu: 9.188 ± 0.212
2.049IleMet: 2.049 ± 0.077
7.165IleAsn: 7.165 ± 0.167
2.964IlePro: 2.964 ± 0.087
1.696IleGln: 1.696 ± 0.069
2.912IleArg: 2.912 ± 0.084
6.937IleSer: 6.937 ± 0.166
5.585IleThr: 5.585 ± 0.13
6.085IleVal: 6.085 ± 0.134
0.406IleTrp: 0.406 ± 0.036
4.382IleTyr: 4.382 ± 0.121
0.0IleXaa: 0.0 ± 0.0
Lys
3.845LysAla: 3.845 ± 0.108
0.97LysCys: 0.97 ± 0.051
6.266LysAsp: 6.266 ± 0.148
9.225LysGlu: 9.225 ± 0.208
3.263LysPhe: 3.263 ± 0.094
4.031LysGly: 4.031 ± 0.114
1.137LysHis: 1.137 ± 0.06
9.526LysIle: 9.526 ± 0.181
11.269LysLys: 11.269 ± 0.227
7.93LysLeu: 7.93 ± 0.147
2.914LysMet: 2.914 ± 0.087
8.405LysAsn: 8.405 ± 0.15
1.866LysPro: 1.866 ± 0.069
2.655LysGln: 2.655 ± 0.088
3.457LysArg: 3.457 ± 0.092
5.399LysSer: 5.399 ± 0.137
5.396LysThr: 5.396 ± 0.124
6.111LysVal: 6.111 ± 0.134
0.49LysTrp: 0.49 ± 0.032
5.669LysTyr: 5.669 ± 0.147
0.0LysXaa: 0.0 ± 0.0
Leu
4.08LeuAla: 4.08 ± 0.109
1.027LeuCys: 1.027 ± 0.048
5.86LeuAsp: 5.86 ± 0.142
6.795LeuGlu: 6.795 ± 0.15
4.321LeuPhe: 4.321 ± 0.124
4.929LeuGly: 4.929 ± 0.128
1.203LeuHis: 1.203 ± 0.057
8.462LeuIle: 8.462 ± 0.218
8.957LeuLys: 8.957 ± 0.153
8.672LeuLeu: 8.672 ± 0.199
1.979LeuMet: 1.979 ± 0.077
6.649LeuAsn: 6.649 ± 0.127
2.647LeuPro: 2.647 ± 0.086
2.249LeuGln: 2.249 ± 0.079
2.859LeuArg: 2.859 ± 0.095
6.468LeuSer: 6.468 ± 0.14
5.089LeuThr: 5.089 ± 0.129
5.511LeuVal: 5.511 ± 0.137
0.422LeuTrp: 0.422 ± 0.036
3.865LeuTyr: 3.865 ± 0.114
0.0LeuXaa: 0.0 ± 0.0
Met
1.258MetAla: 1.258 ± 0.056
0.212MetCys: 0.212 ± 0.022
1.399MetAsp: 1.399 ± 0.066
1.583MetGlu: 1.583 ± 0.062
1.132MetPhe: 1.132 ± 0.076
1.334MetGly: 1.334 ± 0.061
0.33MetHis: 0.33 ± 0.032
2.112MetIle: 2.112 ± 0.087
2.453MetLys: 2.453 ± 0.079
2.154MetLeu: 2.154 ± 0.075
0.66MetMet: 0.66 ± 0.046
1.651MetAsn: 1.651 ± 0.065
0.736MetPro: 0.736 ± 0.042
0.76MetGln: 0.76 ± 0.053
0.791MetArg: 0.791 ± 0.044
1.659MetSer: 1.659 ± 0.071
1.114MetThr: 1.114 ± 0.057
1.224MetVal: 1.224 ± 0.069
0.165MetTrp: 0.165 ± 0.019
1.064MetTyr: 1.064 ± 0.05
0.0MetXaa: 0.0 ± 0.0
Asn
2.786AsnAla: 2.786 ± 0.089
0.831AsnCys: 0.831 ± 0.05
4.361AsnAsp: 4.361 ± 0.117
4.725AsnGlu: 4.725 ± 0.119
2.938AsnPhe: 2.938 ± 0.095
3.8AsnGly: 3.8 ± 0.128
0.951AsnHis: 0.951 ± 0.049
7.922AsnIle: 7.922 ± 0.154
7.951AsnLys: 7.951 ± 0.173
6.253AsnLeu: 6.253 ± 0.147
1.916AsnMet: 1.916 ± 0.076
6.837AsnAsn: 6.837 ± 0.197
1.96AsnPro: 1.96 ± 0.072
1.698AsnGln: 1.698 ± 0.073
2.162AsnArg: 2.162 ± 0.088
4.57AsnSer: 4.57 ± 0.139
4.209AsnThr: 4.209 ± 0.126
4.225AsnVal: 4.225 ± 0.102
0.375AsnTrp: 0.375 ± 0.031
4.356AsnTyr: 4.356 ± 0.121
0.0AsnXaa: 0.0 ± 0.0
Pro
1.098ProAla: 1.098 ± 0.055
0.228ProCys: 0.228 ± 0.022
1.392ProAsp: 1.392 ± 0.062
1.664ProGlu: 1.664 ± 0.067
1.098ProPhe: 1.098 ± 0.061
1.302ProGly: 1.302 ± 0.071
0.461ProHis: 0.461 ± 0.04
2.319ProIle: 2.319 ± 0.087
2.201ProLys: 2.201 ± 0.071
2.246ProLeu: 2.246 ± 0.075
0.501ProMet: 0.501 ± 0.038
1.827ProAsn: 1.827 ± 0.066
0.446ProPro: 0.446 ± 0.034
0.65ProGln: 0.65 ± 0.04
0.75ProArg: 0.75 ± 0.049
1.583ProSer: 1.583 ± 0.08
1.588ProThr: 1.588 ± 0.073
1.693ProVal: 1.693 ± 0.078
0.149ProTrp: 0.149 ± 0.02
1.426ProTyr: 1.426 ± 0.062
0.0ProXaa: 0.0 ± 0.0
Gln
1.337GlnAla: 1.337 ± 0.059
0.191GlnCys: 0.191 ± 0.021
1.352GlnAsp: 1.352 ± 0.065
2.089GlnGlu: 2.089 ± 0.066
0.862GlnPhe: 0.862 ± 0.047
1.082GlnGly: 1.082 ± 0.06
0.301GlnHis: 0.301 ± 0.027
2.33GlnIle: 2.33 ± 0.075
2.71GlnLys: 2.71 ± 0.088
2.091GlnLeu: 2.091 ± 0.083
0.632GlnMet: 0.632 ± 0.047
1.816GlnAsn: 1.816 ± 0.075
0.535GlnPro: 0.535 ± 0.04
0.789GlnGln: 0.789 ± 0.064
0.833GlnArg: 0.833 ± 0.048
1.318GlnSer: 1.318 ± 0.06
1.169GlnThr: 1.169 ± 0.052
1.536GlnVal: 1.536 ± 0.07
0.136GlnTrp: 0.136 ± 0.021
0.993GlnTyr: 0.993 ± 0.054
0.0GlnXaa: 0.0 ± 0.0
Arg
1.308ArgAla: 1.308 ± 0.068
0.349ArgCys: 0.349 ± 0.031
1.887ArgAsp: 1.887 ± 0.068
2.458ArgGlu: 2.458 ± 0.094
1.334ArgPhe: 1.334 ± 0.056
1.675ArgGly: 1.675 ± 0.071
0.545ArgHis: 0.545 ± 0.034
2.875ArgIle: 2.875 ± 0.08
3.501ArgLys: 3.501 ± 0.1
3.056ArgLeu: 3.056 ± 0.089
0.812ArgMet: 0.812 ± 0.046
2.243ArgAsn: 2.243 ± 0.083
0.755ArgPro: 0.755 ± 0.043
0.902ArgGln: 0.902 ± 0.049
1.292ArgArg: 1.292 ± 0.065
1.764ArgSer: 1.764 ± 0.064
1.53ArgThr: 1.53 ± 0.065
2.057ArgVal: 2.057 ± 0.085
0.16ArgTrp: 0.16 ± 0.018
1.559ArgTyr: 1.559 ± 0.058
0.0ArgXaa: 0.0 ± 0.0
Ser
2.621SerAla: 2.621 ± 0.09
0.828SerCys: 0.828 ± 0.047
3.936SerAsp: 3.936 ± 0.104
3.706SerGlu: 3.706 ± 0.107
3.313SerPhe: 3.313 ± 0.099
3.493SerGly: 3.493 ± 0.11
0.831SerHis: 0.831 ± 0.055
6.232SerIle: 6.232 ± 0.148
6.41SerLys: 6.41 ± 0.155
6.308SerLeu: 6.308 ± 0.147
1.504SerMet: 1.504 ± 0.078
5.144SerAsn: 5.144 ± 0.153
1.386SerPro: 1.386 ± 0.068
1.583SerGln: 1.583 ± 0.062
1.994SerArg: 1.994 ± 0.077
5.071SerSer: 5.071 ± 0.179
3.423SerThr: 3.423 ± 0.118
3.611SerVal: 3.611 ± 0.102
0.39SerTrp: 0.39 ± 0.038
3.43SerTyr: 3.43 ± 0.099
0.0SerXaa: 0.0 ± 0.0
Thr
2.466ThrAla: 2.466 ± 0.095
0.616ThrCys: 0.616 ± 0.045
3.03ThrAsp: 3.03 ± 0.098
2.922ThrGlu: 2.922 ± 0.086
2.351ThrPhe: 2.351 ± 0.08
3.305ThrGly: 3.305 ± 0.106
0.818ThrHis: 0.818 ± 0.044
5.241ThrIle: 5.241 ± 0.111
5.375ThrLys: 5.375 ± 0.129
5.249ThrLeu: 5.249 ± 0.124
1.067ThrMet: 1.067 ± 0.062
3.858ThrAsn: 3.858 ± 0.123
1.858ThrPro: 1.858 ± 0.073
1.085ThrGln: 1.085 ± 0.049
1.596ThrArg: 1.596 ± 0.06
4.12ThrSer: 4.12 ± 0.144
3.69ThrThr: 3.69 ± 0.136
3.168ThrVal: 3.168 ± 0.126
0.267ThrTrp: 0.267 ± 0.029
2.906ThrTyr: 2.906 ± 0.106
0.0ThrXaa: 0.0 ± 0.0
Val
2.943ValAla: 2.943 ± 0.096
0.757ValCys: 0.757 ± 0.044
3.758ValAsp: 3.758 ± 0.105
3.947ValGlu: 3.947 ± 0.11
2.521ValPhe: 2.521 ± 0.097
3.538ValGly: 3.538 ± 0.108
0.784ValHis: 0.784 ± 0.043
5.923ValIle: 5.923 ± 0.126
5.412ValLys: 5.412 ± 0.14
5.692ValLeu: 5.692 ± 0.123
1.441ValMet: 1.441 ± 0.066
4.054ValAsn: 4.054 ± 0.125
1.738ValPro: 1.738 ± 0.074
1.221ValGln: 1.221 ± 0.058
1.916ValArg: 1.916 ± 0.065
4.314ValSer: 4.314 ± 0.11
3.564ValThr: 3.564 ± 0.12
4.379ValVal: 4.379 ± 0.124
0.309ValTrp: 0.309 ± 0.026
2.605ValTyr: 2.605 ± 0.085
0.0ValXaa: 0.0 ± 0.0
Trp
0.22TrpAla: 0.22 ± 0.023
0.11TrpCys: 0.11 ± 0.017
0.338TrpAsp: 0.338 ± 0.035
0.335TrpGlu: 0.335 ± 0.027
0.275TrpPhe: 0.275 ± 0.029
0.238TrpGly: 0.238 ± 0.027
0.086TrpHis: 0.086 ± 0.016
0.435TrpIle: 0.435 ± 0.032
0.367TrpLys: 0.367 ± 0.03
0.495TrpLeu: 0.495 ± 0.038
0.142TrpMet: 0.142 ± 0.021
0.37TrpAsn: 0.37 ± 0.029
0.123TrpPro: 0.123 ± 0.017
0.155TrpGln: 0.155 ± 0.02
0.16TrpArg: 0.16 ± 0.019
0.333TrpSer: 0.333 ± 0.033
0.296TrpThr: 0.296 ± 0.032
0.288TrpVal: 0.288 ± 0.029
0.047TrpTrp: 0.047 ± 0.012
0.322TrpTyr: 0.322 ± 0.03
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.078TyrAla: 2.078 ± 0.079
0.629TyrCys: 0.629 ± 0.042
3.454TyrAsp: 3.454 ± 0.091
3.265TyrGlu: 3.265 ± 0.1
2.401TyrPhe: 2.401 ± 0.084
2.647TyrGly: 2.647 ± 0.087
0.867TyrHis: 0.867 ± 0.047
4.586TyrIle: 4.586 ± 0.146
4.67TyrLys: 4.67 ± 0.142
5.079TyrLeu: 5.079 ± 0.136
0.98TyrMet: 0.98 ± 0.05
4.088TyrAsn: 4.088 ± 0.12
1.276TyrPro: 1.276 ± 0.068
1.627TyrGln: 1.627 ± 0.078
1.651TyrArg: 1.651 ± 0.058
3.197TyrSer: 3.197 ± 0.093
2.579TyrThr: 2.579 ± 0.091
2.757TyrVal: 2.757 ± 0.079
0.218TyrTrp: 0.218 ± 0.027
2.875TyrTyr: 2.875 ± 0.114
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 1291 proteins (381582 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