Amino acid dipepetide frequency for Synechococcus sp. RSCCF101

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
16.559AlaAla: 16.559 ± 0.21
1.557AlaCys: 1.557 ± 0.055
6.829AlaAsp: 6.829 ± 0.178
7.018AlaGlu: 7.018 ± 0.123
3.2AlaPhe: 3.2 ± 0.079
11.181AlaGly: 11.181 ± 0.118
1.919AlaHis: 1.919 ± 0.055
4.82AlaIle: 4.82 ± 0.087
1.509AlaLys: 1.509 ± 0.054
15.114AlaLeu: 15.114 ± 0.224
2.835AlaMet: 2.835 ± 0.077
1.985AlaAsn: 1.985 ± 0.052
6.253AlaPro: 6.253 ± 0.111
3.471AlaGln: 3.471 ± 0.063
8.284AlaArg: 8.284 ± 0.166
7.429AlaSer: 7.429 ± 0.146
5.242AlaThr: 5.242 ± 0.101
8.585AlaVal: 8.585 ± 0.118
1.767AlaTrp: 1.767 ± 0.06
1.854AlaTyr: 1.854 ± 0.052
0.0AlaXaa: 0.0 ± 0.0
Cys
0.893CysAla: 0.893 ± 0.037
0.269CysCys: 0.269 ± 0.025
0.692CysAsp: 0.692 ± 0.033
0.562CysGlu: 0.562 ± 0.027
0.382CysPhe: 0.382 ± 0.024
1.271CysGly: 1.271 ± 0.047
0.283CysHis: 0.283 ± 0.018
0.368CysIle: 0.368 ± 0.027
0.155CysLys: 0.155 ± 0.014
1.386CysLeu: 1.386 ± 0.047
0.175CysMet: 0.175 ± 0.014
0.234CysAsn: 0.234 ± 0.016
0.751CysPro: 0.751 ± 0.031
0.359CysGln: 0.359 ± 0.02
1.402CysArg: 1.402 ± 0.057
0.878CysSer: 0.878 ± 0.039
0.476CysThr: 0.476 ± 0.022
0.628CysVal: 0.628 ± 0.032
0.265CysTrp: 0.265 ± 0.017
0.197CysTyr: 0.197 ± 0.016
0.0CysXaa: 0.0 ± 0.0
Asp
6.3AspAla: 6.3 ± 0.213
0.573AspCys: 0.573 ± 0.03
2.862AspAsp: 2.862 ± 0.203
2.693AspGlu: 2.693 ± 0.066
1.469AspPhe: 1.469 ± 0.068
5.783AspGly: 5.783 ± 0.213
1.212AspHis: 1.212 ± 0.064
1.545AspIle: 1.545 ± 0.055
0.685AspLys: 0.685 ± 0.041
7.394AspLeu: 7.394 ± 0.116
0.742AspMet: 0.742 ± 0.039
0.926AspAsn: 0.926 ± 0.042
4.694AspPro: 4.694 ± 0.099
2.387AspGln: 2.387 ± 0.082
4.791AspArg: 4.791 ± 0.081
2.737AspSer: 2.737 ± 0.143
2.239AspThr: 2.239 ± 0.099
3.45AspVal: 3.45 ± 0.131
1.064AspTrp: 1.064 ± 0.044
0.979AspTyr: 0.979 ± 0.04
0.0AspXaa: 0.0 ± 0.0
Glu
8.356GluAla: 8.356 ± 0.137
0.373GluCys: 0.373 ± 0.023
2.619GluAsp: 2.619 ± 0.065
3.635GluGlu: 3.635 ± 0.078
1.17GluPhe: 1.17 ± 0.036
4.804GluGly: 4.804 ± 0.085
1.235GluHis: 1.235 ± 0.039
1.979GluIle: 1.979 ± 0.048
1.07GluLys: 1.07 ± 0.05
7.26GluLeu: 7.26 ± 0.112
0.85GluMet: 0.85 ± 0.032
1.021GluAsn: 1.021 ± 0.033
3.877GluPro: 3.877 ± 0.081
2.978GluGln: 2.978 ± 0.07
6.49GluArg: 6.49 ± 0.135
2.996GluSer: 2.996 ± 0.07
2.524GluThr: 2.524 ± 0.064
3.939GluVal: 3.939 ± 0.098
0.708GluTrp: 0.708 ± 0.032
0.603GluTyr: 0.603 ± 0.028
0.0GluXaa: 0.0 ± 0.0
Phe
2.87PheAla: 2.87 ± 0.066
0.403PheCys: 0.403 ± 0.022
1.865PheAsp: 1.865 ± 0.071
1.698PheGlu: 1.698 ± 0.068
0.897PhePhe: 0.897 ± 0.037
2.638PheGly: 2.638 ± 0.061
0.683PheHis: 0.683 ± 0.031
1.13PheIle: 1.13 ± 0.044
0.508PheLys: 0.508 ± 0.03
2.999PheLeu: 2.999 ± 0.067
0.481PheMet: 0.481 ± 0.029
0.919PheAsn: 0.919 ± 0.05
1.399PhePro: 1.399 ± 0.065
1.067PheGln: 1.067 ± 0.04
2.246PheArg: 2.246 ± 0.059
2.177PheSer: 2.177 ± 0.071
1.635PheThr: 1.635 ± 0.084
1.692PheVal: 1.692 ± 0.051
0.536PheTrp: 0.536 ± 0.029
0.666PheTyr: 0.666 ± 0.034
0.0PheXaa: 0.0 ± 0.0
Gly
9.009GlyAla: 9.009 ± 0.145
1.304GlyCys: 1.304 ± 0.046
4.854GlyAsp: 4.854 ± 0.117
4.922GlyGlu: 4.922 ± 0.092
3.078GlyPhe: 3.078 ± 0.061
8.278GlyGly: 8.278 ± 0.199
1.84GlyHis: 1.84 ± 0.055
3.418GlyIle: 3.418 ± 0.073
1.678GlyLys: 1.678 ± 0.051
11.131GlyLeu: 11.131 ± 0.163
1.942GlyMet: 1.942 ± 0.122
1.844GlyAsn: 1.844 ± 0.094
4.498GlyPro: 4.498 ± 0.083
3.248GlyGln: 3.248 ± 0.082
7.439GlyArg: 7.439 ± 0.153
6.803GlySer: 6.803 ± 0.194
4.768GlyThr: 4.768 ± 0.241
6.056GlyVal: 6.056 ± 0.095
1.851GlyTrp: 1.851 ± 0.064
1.663GlyTyr: 1.663 ± 0.054
0.0GlyXaa: 0.0 ± 0.0
His
1.944HisAla: 1.944 ± 0.063
0.349HisCys: 0.349 ± 0.024
1.046HisAsp: 1.046 ± 0.049
0.878HisGlu: 0.878 ± 0.031
0.61HisPhe: 0.61 ± 0.028
2.013HisGly: 2.013 ± 0.064
0.77HisHis: 0.77 ± 0.041
0.591HisIle: 0.591 ± 0.03
0.259HisLys: 0.259 ± 0.018
2.63HisLeu: 2.63 ± 0.069
0.266HisMet: 0.266 ± 0.017
0.398HisAsn: 0.398 ± 0.022
1.821HisPro: 1.821 ± 0.053
0.847HisGln: 0.847 ± 0.035
2.285HisArg: 2.285 ± 0.071
1.14HisSer: 1.14 ± 0.041
0.85HisThr: 0.85 ± 0.036
1.05HisVal: 1.05 ± 0.038
0.579HisTrp: 0.579 ± 0.031
0.443HisTyr: 0.443 ± 0.025
0.0HisXaa: 0.0 ± 0.0
Ile
4.517IleAla: 4.517 ± 0.091
0.441IleCys: 0.441 ± 0.025
2.775IleAsp: 2.775 ± 0.085
2.57IleGlu: 2.57 ± 0.067
0.872IlePhe: 0.872 ± 0.034
3.843IleGly: 3.843 ± 0.067
0.82IleHis: 0.82 ± 0.037
1.001IleIle: 1.001 ± 0.042
0.767IleLys: 0.767 ± 0.032
3.248IleLeu: 3.248 ± 0.085
0.315IleMet: 0.315 ± 0.02
1.178IleAsn: 1.178 ± 0.065
2.247IlePro: 2.247 ± 0.06
1.317IleGln: 1.317 ± 0.04
3.203IleArg: 3.203 ± 0.075
2.705IleSer: 2.705 ± 0.089
2.407IleThr: 2.407 ± 0.075
2.27IleVal: 2.27 ± 0.056
0.612IleTrp: 0.612 ± 0.031
0.678IleTyr: 0.678 ± 0.037
0.0IleXaa: 0.0 ± 0.0
Lys
2.058LysAla: 2.058 ± 0.065
0.105LysCys: 0.105 ± 0.011
0.826LysAsp: 0.826 ± 0.048
0.963LysGlu: 0.963 ± 0.045
0.39LysPhe: 0.39 ± 0.036
1.511LysGly: 1.511 ± 0.061
0.249LysHis: 0.249 ± 0.017
0.578LysIle: 0.578 ± 0.032
0.45LysLys: 0.45 ± 0.027
1.727LysLeu: 1.727 ± 0.048
0.243LysMet: 0.243 ± 0.018
0.323LysAsn: 0.323 ± 0.021
1.018LysPro: 1.018 ± 0.041
0.753LysGln: 0.753 ± 0.032
1.464LysArg: 1.464 ± 0.052
0.851LysSer: 0.851 ± 0.032
0.948LysThr: 0.948 ± 0.036
1.224LysVal: 1.224 ± 0.05
0.142LysTrp: 0.142 ± 0.012
0.304LysTyr: 0.304 ± 0.019
0.0LysXaa: 0.0 ± 0.0
Leu
15.433LeuAla: 15.433 ± 0.237
1.311LeuCys: 1.311 ± 0.05
6.511LeuAsp: 6.511 ± 0.1
8.672LeuGlu: 8.672 ± 0.135
3.304LeuPhe: 3.304 ± 0.076
9.18LeuGly: 9.18 ± 0.137
2.498LeuHis: 2.498 ± 0.067
5.006LeuIle: 5.006 ± 0.086
2.278LeuLys: 2.278 ± 0.065
16.148LeuLeu: 16.148 ± 0.323
2.474LeuMet: 2.474 ± 0.065
2.786LeuAsn: 2.786 ± 0.085
7.548LeuPro: 7.548 ± 0.136
5.707LeuGln: 5.707 ± 0.115
10.322LeuArg: 10.322 ± 0.213
8.15LeuSer: 8.15 ± 0.127
6.085LeuThr: 6.085 ± 0.21
8.791LeuVal: 8.791 ± 0.161
1.814LeuTrp: 1.814 ± 0.06
1.764LeuTyr: 1.764 ± 0.053
0.0LeuXaa: 0.0 ± 0.0
Met
3.0MetAla: 3.0 ± 0.071
0.091MetCys: 0.091 ± 0.01
0.938MetAsp: 0.938 ± 0.039
1.182MetGlu: 1.182 ± 0.049
0.304MetPhe: 0.304 ± 0.018
1.644MetGly: 1.644 ± 0.051
0.333MetHis: 0.333 ± 0.02
0.578MetIle: 0.578 ± 0.029
0.401MetLys: 0.401 ± 0.025
1.885MetLeu: 1.885 ± 0.058
0.252MetMet: 0.252 ± 0.019
0.399MetAsn: 0.399 ± 0.023
1.247MetPro: 1.247 ± 0.046
0.655MetGln: 0.655 ± 0.028
1.33MetArg: 1.33 ± 0.045
1.093MetSer: 1.093 ± 0.041
1.234MetThr: 1.234 ± 0.115
1.478MetVal: 1.478 ± 0.053
0.11MetTrp: 0.11 ± 0.011
0.153MetTyr: 0.153 ± 0.013
0.0MetXaa: 0.0 ± 0.0
Asn
2.271AsnAla: 2.271 ± 0.117
0.195AsnCys: 0.195 ± 0.014
1.2AsnAsp: 1.2 ± 0.056
0.863AsnGlu: 0.863 ± 0.033
0.575AsnPhe: 0.575 ± 0.039
2.181AsnGly: 2.181 ± 0.099
0.46AsnHis: 0.46 ± 0.026
0.702AsnIle: 0.702 ± 0.042
0.383AsnLys: 0.383 ± 0.024
2.499AsnLeu: 2.499 ± 0.073
0.241AsnMet: 0.241 ± 0.018
0.592AsnAsn: 0.592 ± 0.053
1.595AsnPro: 1.595 ± 0.045
0.772AsnGln: 0.772 ± 0.03
1.865AsnArg: 1.865 ± 0.066
1.175AsnSer: 1.175 ± 0.05
1.021AsnThr: 1.021 ± 0.06
1.278AsnVal: 1.278 ± 0.043
0.341AsnTrp: 0.341 ± 0.02
0.394AsnTyr: 0.394 ± 0.022
0.0AsnXaa: 0.0 ± 0.0
Pro
8.218ProAla: 8.218 ± 0.127
0.603ProCys: 0.603 ± 0.03
3.959ProAsp: 3.959 ± 0.089
4.811ProGlu: 4.811 ± 0.088
1.684ProPhe: 1.684 ± 0.054
6.062ProGly: 6.062 ± 0.204
1.132ProHis: 1.132 ± 0.041
2.076ProIle: 2.076 ± 0.048
0.751ProLys: 0.751 ± 0.033
7.426ProLeu: 7.426 ± 0.13
1.246ProMet: 1.246 ± 0.042
0.941ProAsn: 0.941 ± 0.063
3.995ProPro: 3.995 ± 0.089
2.164ProGln: 2.164 ± 0.064
3.83ProArg: 3.83 ± 0.092
3.968ProSer: 3.968 ± 0.078
2.657ProThr: 2.657 ± 0.078
4.436ProVal: 4.436 ± 0.088
1.115ProTrp: 1.115 ± 0.047
1.009ProTyr: 1.009 ± 0.036
0.0ProXaa: 0.0 ± 0.0
Gln
5.269GlnAla: 5.269 ± 0.091
0.332GlnCys: 0.332 ± 0.019
1.558GlnAsp: 1.558 ± 0.047
2.382GlnGlu: 2.382 ± 0.06
0.84GlnPhe: 0.84 ± 0.035
3.203GlnGly: 3.203 ± 0.063
0.788GlnHis: 0.788 ± 0.031
1.442GlnIle: 1.442 ± 0.046
0.682GlnLys: 0.682 ± 0.031
5.548GlnLeu: 5.548 ± 0.101
0.57GlnMet: 0.57 ± 0.025
0.645GlnAsn: 0.645 ± 0.045
2.749GlnPro: 2.749 ± 0.078
2.4GlnGln: 2.4 ± 0.073
4.191GlnArg: 4.191 ± 0.101
1.914GlnSer: 1.914 ± 0.047
1.548GlnThr: 1.548 ± 0.071
2.966GlnVal: 2.966 ± 0.073
0.606GlnTrp: 0.606 ± 0.027
0.398GlnTyr: 0.398 ± 0.02
0.0GlnXaa: 0.0 ± 0.0
Arg
7.703ArgAla: 7.703 ± 0.145
1.295ArgCys: 1.295 ± 0.045
4.184ArgAsp: 4.184 ± 0.095
4.647ArgGlu: 4.647 ± 0.106
3.113ArgPhe: 3.113 ± 0.079
5.733ArgGly: 5.733 ± 0.122
2.299ArgHis: 2.299 ± 0.066
3.432ArgIle: 3.432 ± 0.064
1.193ArgLys: 1.193 ± 0.044
11.783ArgLeu: 11.783 ± 0.24
1.578ArgMet: 1.578 ± 0.05
1.572ArgAsn: 1.572 ± 0.047
5.034ArgPro: 5.034 ± 0.141
4.301ArgGln: 4.301 ± 0.1
9.031ArgArg: 9.031 ± 0.195
5.592ArgSer: 5.592 ± 0.125
3.318ArgThr: 3.318 ± 0.07
5.024ArgVal: 5.024 ± 0.095
2.073ArgTrp: 2.073 ± 0.064
1.662ArgTyr: 1.662 ± 0.054
0.0ArgXaa: 0.0 ± 0.0
Ser
6.428SerAla: 6.428 ± 0.093
0.739SerCys: 0.739 ± 0.035
3.842SerAsp: 3.842 ± 0.256
3.432SerGlu: 3.432 ± 0.062
2.09SerPhe: 2.09 ± 0.091
7.511SerGly: 7.511 ± 0.248
1.331SerHis: 1.331 ± 0.045
2.408SerIle: 2.408 ± 0.088
0.954SerLys: 0.954 ± 0.043
7.733SerLeu: 7.733 ± 0.123
1.235SerMet: 1.235 ± 0.044
1.321SerAsn: 1.321 ± 0.063
3.746SerPro: 3.746 ± 0.065
2.13SerGln: 2.13 ± 0.053
5.185SerArg: 5.185 ± 0.107
4.356SerSer: 4.356 ± 0.133
3.124SerThr: 3.124 ± 0.139
3.986SerVal: 3.986 ± 0.071
1.125SerTrp: 1.125 ± 0.04
1.093SerTyr: 1.093 ± 0.044
0.0SerXaa: 0.0 ± 0.0
Thr
5.763ThrAla: 5.763 ± 0.105
0.473ThrCys: 0.473 ± 0.022
2.575ThrAsp: 2.575 ± 0.222
2.0ThrGlu: 2.0 ± 0.093
1.339ThrPhe: 1.339 ± 0.053
4.676ThrGly: 4.676 ± 0.141
0.8ThrHis: 0.8 ± 0.037
2.208ThrIle: 2.208 ± 0.09
0.631ThrLys: 0.631 ± 0.029
6.147ThrLeu: 6.147 ± 0.186
0.742ThrMet: 0.742 ± 0.028
0.981ThrAsn: 0.981 ± 0.066
3.778ThrPro: 3.778 ± 0.202
1.322ThrGln: 1.322 ± 0.08
2.895ThrArg: 2.895 ± 0.061
2.974ThrSer: 2.974 ± 0.117
2.779ThrThr: 2.779 ± 0.136
3.898ThrVal: 3.898 ± 0.139
0.668ThrTrp: 0.668 ± 0.03
0.961ThrTyr: 0.961 ± 0.036
0.0ThrXaa: 0.0 ± 0.0
Val
7.949ValAla: 7.949 ± 0.106
0.749ValCys: 0.749 ± 0.032
3.744ValAsp: 3.744 ± 0.131
4.047ValGlu: 4.047 ± 0.075
2.177ValPhe: 2.177 ± 0.074
5.047ValGly: 5.047 ± 0.08
1.363ValHis: 1.363 ± 0.043
3.203ValIle: 3.203 ± 0.07
1.176ValLys: 1.176 ± 0.042
9.072ValLeu: 9.072 ± 0.161
1.518ValMet: 1.518 ± 0.048
1.705ValAsn: 1.705 ± 0.049
3.859ValPro: 3.859 ± 0.131
2.524ValGln: 2.524 ± 0.049
4.857ValArg: 4.857 ± 0.098
4.496ValSer: 4.496 ± 0.104
3.381ValThr: 3.381 ± 0.179
6.118ValVal: 6.118 ± 0.095
0.9ValTrp: 0.9 ± 0.038
1.06ValTyr: 1.06 ± 0.046
0.0ValXaa: 0.0 ± 0.0
Trp
1.285TrpAla: 1.285 ± 0.044
0.273TrpCys: 0.273 ± 0.02
0.708TrpAsp: 0.708 ± 0.03
0.654TrpGlu: 0.654 ± 0.03
0.5TrpPhe: 0.5 ± 0.024
1.217TrpGly: 1.217 ± 0.046
0.424TrpHis: 0.424 ± 0.024
0.765TrpIle: 0.765 ± 0.028
0.29TrpLys: 0.29 ± 0.019
2.717TrpLeu: 2.717 ± 0.084
0.385TrpMet: 0.385 ± 0.025
0.397TrpAsn: 0.397 ± 0.024
1.039TrpPro: 1.039 ± 0.037
1.051TrpGln: 1.051 ± 0.034
1.727TrpArg: 1.727 ± 0.06
1.276TrpSer: 1.276 ± 0.042
0.674TrpThr: 0.674 ± 0.029
0.923TrpVal: 0.923 ± 0.038
0.382TrpTrp: 0.382 ± 0.023
0.263TrpTyr: 0.263 ± 0.022
0.0TrpXaa: 0.0 ± 0.0
Tyr
1.587TyrAla: 1.587 ± 0.05
0.192TyrCys: 0.192 ± 0.015
0.938TyrAsp: 0.938 ± 0.037
0.857TyrGlu: 0.857 ± 0.039
0.516TyrPhe: 0.516 ± 0.027
1.85TyrGly: 1.85 ± 0.062
0.33TyrHis: 0.33 ± 0.019
0.535TyrIle: 0.535 ± 0.03
0.308TyrLys: 0.308 ± 0.019
1.937TyrLeu: 1.937 ± 0.052
0.215TyrMet: 0.215 ± 0.016
0.434TyrAsn: 0.434 ± 0.022
0.932TyrPro: 0.932 ± 0.035
0.58TyrGln: 0.58 ± 0.03
1.727TyrArg: 1.727 ± 0.053
1.058TyrSer: 1.058 ± 0.039
0.701TyrThr: 0.701 ± 0.029
1.154TyrVal: 1.154 ± 0.037
0.292TyrTrp: 0.292 ± 0.017
0.35TyrTyr: 0.35 ± 0.019
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 2660 proteins (856344 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