Amino acid dipepetide frequency for beta proteobacterium AAP65

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
23.485AlaAla: 23.485 ± 0.272
1.281AlaCys: 1.281 ± 0.031
6.596AlaAsp: 6.596 ± 0.08
8.02AlaGlu: 8.02 ± 0.114
3.986AlaPhe: 3.986 ± 0.053
12.468AlaGly: 12.468 ± 0.14
2.739AlaHis: 2.739 ± 0.055
4.089AlaIle: 4.089 ± 0.066
3.264AlaLys: 3.264 ± 0.078
18.174AlaLeu: 18.174 ± 0.269
3.333AlaMet: 3.333 ± 0.059
2.588AlaAsn: 2.588 ± 0.053
7.998AlaPro: 7.998 ± 0.114
6.869AlaGln: 6.869 ± 0.157
9.868AlaArg: 9.868 ± 0.112
6.618AlaSer: 6.618 ± 0.091
7.022AlaThr: 7.022 ± 0.102
10.264AlaVal: 10.264 ± 0.096
2.518AlaTrp: 2.518 ± 0.051
2.442AlaTyr: 2.442 ± 0.05
0.0AlaXaa: 0.0 ± 0.0
Cys
1.078CysAla: 1.078 ± 0.032
0.089CysCys: 0.089 ± 0.008
0.446CysAsp: 0.446 ± 0.017
0.483CysGlu: 0.483 ± 0.018
0.287CysPhe: 0.287 ± 0.014
0.91CysGly: 0.91 ± 0.028
0.236CysHis: 0.236 ± 0.016
0.332CysIle: 0.332 ± 0.018
0.183CysLys: 0.183 ± 0.011
0.778CysLeu: 0.778 ± 0.026
0.151CysMet: 0.151 ± 0.011
0.217CysAsn: 0.217 ± 0.014
0.462CysPro: 0.462 ± 0.021
0.258CysGln: 0.258 ± 0.015
0.56CysArg: 0.56 ± 0.021
0.481CysSer: 0.481 ± 0.02
0.533CysThr: 0.533 ± 0.022
0.64CysVal: 0.64 ± 0.025
0.107CysTrp: 0.107 ± 0.01
0.17CysTyr: 0.17 ± 0.011
0.0CysXaa: 0.0 ± 0.0
Asp
6.852AspAla: 6.852 ± 0.09
0.364AspCys: 0.364 ± 0.018
2.484AspAsp: 2.484 ± 0.052
3.071AspGlu: 3.071 ± 0.053
1.801AspPhe: 1.801 ± 0.042
4.559AspGly: 4.559 ± 0.086
0.967AspHis: 0.967 ± 0.03
2.149AspIle: 2.149 ± 0.039
1.353AspLys: 1.353 ± 0.041
4.935AspLeu: 4.935 ± 0.065
0.878AspMet: 0.878 ± 0.026
1.134AspAsn: 1.134 ± 0.031
2.812AspPro: 2.812 ± 0.043
1.307AspGln: 1.307 ± 0.033
3.063AspArg: 3.063 ± 0.056
2.071AspSer: 2.071 ± 0.049
2.68AspThr: 2.68 ± 0.041
3.591AspVal: 3.591 ± 0.056
0.85AspTrp: 0.85 ± 0.028
1.059AspTyr: 1.059 ± 0.032
0.0AspXaa: 0.0 ± 0.0
Glu
7.859GluAla: 7.859 ± 0.112
0.288GluCys: 0.288 ± 0.016
2.087GluAsp: 2.087 ± 0.043
2.169GluGlu: 2.169 ± 0.061
1.6GluPhe: 1.6 ± 0.042
4.257GluGly: 4.257 ± 0.068
1.327GluHis: 1.327 ± 0.033
2.21GluIle: 2.21 ± 0.051
1.58GluLys: 1.58 ± 0.045
5.94GluLeu: 5.94 ± 0.08
1.144GluMet: 1.144 ± 0.034
1.063GluAsn: 1.063 ± 0.03
2.677GluPro: 2.677 ± 0.043
2.39GluGln: 2.39 ± 0.046
4.765GluArg: 4.765 ± 0.071
2.005GluSer: 2.005 ± 0.044
2.474GluThr: 2.474 ± 0.039
4.192GluVal: 4.192 ± 0.066
0.659GluTrp: 0.659 ± 0.023
0.814GluTyr: 0.814 ± 0.027
0.0GluXaa: 0.0 ± 0.0
Phe
3.886PheAla: 3.886 ± 0.058
0.319PheCys: 0.319 ± 0.016
2.284PheAsp: 2.284 ± 0.047
2.166PheGlu: 2.166 ± 0.037
1.253PhePhe: 1.253 ± 0.038
3.268PheGly: 3.268 ± 0.061
0.671PheHis: 0.671 ± 0.025
1.418PheIle: 1.418 ± 0.036
1.029PheLys: 1.029 ± 0.033
2.657PheLeu: 2.657 ± 0.05
0.699PheMet: 0.699 ± 0.025
1.076PheAsn: 1.076 ± 0.03
1.31PhePro: 1.31 ± 0.029
1.057PheGln: 1.057 ± 0.029
1.818PheArg: 1.818 ± 0.036
2.019PheSer: 2.019 ± 0.039
1.932PheThr: 1.932 ± 0.045
2.635PheVal: 2.635 ± 0.053
0.475PheTrp: 0.475 ± 0.019
0.719PheTyr: 0.719 ± 0.026
0.0PheXaa: 0.0 ± 0.0
Gly
10.796GlyAla: 10.796 ± 0.117
0.897GlyCys: 0.897 ± 0.03
3.954GlyAsp: 3.954 ± 0.067
4.469GlyGlu: 4.469 ± 0.064
3.167GlyPhe: 3.167 ± 0.051
8.238GlyGly: 8.238 ± 0.271
2.038GlyHis: 2.038 ± 0.046
3.191GlyIle: 3.191 ± 0.049
2.561GlyLys: 2.561 ± 0.063
10.231GlyLeu: 10.231 ± 0.106
1.961GlyMet: 1.961 ± 0.041
2.085GlyAsn: 2.085 ± 0.073
3.813GlyPro: 3.813 ± 0.052
3.75GlyGln: 3.75 ± 0.052
6.285GlyArg: 6.285 ± 0.074
5.0GlySer: 5.0 ± 0.126
5.064GlyThr: 5.064 ± 0.122
6.787GlyVal: 6.787 ± 0.08
1.648GlyTrp: 1.648 ± 0.035
2.095GlyTyr: 2.095 ± 0.047
0.0GlyXaa: 0.0 ± 0.0
His
3.033HisAla: 3.033 ± 0.067
0.269HisCys: 0.269 ± 0.016
1.106HisAsp: 1.106 ± 0.03
1.149HisGlu: 1.149 ± 0.036
0.906HisPhe: 0.906 ± 0.029
2.203HisGly: 2.203 ± 0.052
0.622HisHis: 0.622 ± 0.026
0.785HisIle: 0.785 ± 0.022
0.455HisLys: 0.455 ± 0.019
2.257HisLeu: 2.257 ± 0.044
0.38HisMet: 0.38 ± 0.017
0.438HisAsn: 0.438 ± 0.02
1.52HisPro: 1.52 ± 0.037
0.746HisGln: 0.746 ± 0.023
1.621HisArg: 1.621 ± 0.04
0.959HisSer: 0.959 ± 0.025
1.202HisThr: 1.202 ± 0.033
1.51HisVal: 1.51 ± 0.038
0.416HisTrp: 0.416 ± 0.018
0.56HisTyr: 0.56 ± 0.02
0.0HisXaa: 0.0 ± 0.0
Ile
4.912IleAla: 4.912 ± 0.078
0.286IleCys: 0.286 ± 0.016
2.666IleAsp: 2.666 ± 0.046
2.676IleGlu: 2.676 ± 0.053
1.068IlePhe: 1.068 ± 0.031
3.552IleGly: 3.552 ± 0.063
0.636IleHis: 0.636 ± 0.022
1.002IleIle: 1.002 ± 0.031
1.065IleLys: 1.065 ± 0.038
2.251IleLeu: 2.251 ± 0.046
0.518IleMet: 0.518 ± 0.021
1.192IleAsn: 1.192 ± 0.032
1.498IlePro: 1.498 ± 0.033
1.046IleGln: 1.046 ± 0.027
1.951IleArg: 1.951 ± 0.043
1.938IleSer: 1.938 ± 0.045
2.341IleThr: 2.341 ± 0.053
2.894IleVal: 2.894 ± 0.048
0.338IleTrp: 0.338 ± 0.016
0.72IleTyr: 0.72 ± 0.025
0.0IleXaa: 0.0 ± 0.0
Lys
3.549LysAla: 3.549 ± 0.079
0.146LysCys: 0.146 ± 0.011
1.264LysAsp: 1.264 ± 0.039
1.112LysGlu: 1.112 ± 0.04
0.756LysPhe: 0.756 ± 0.028
1.962LysGly: 1.962 ± 0.045
0.574LysHis: 0.574 ± 0.023
1.076LysIle: 1.076 ± 0.037
1.082LysLys: 1.082 ± 0.043
3.05LysLeu: 3.05 ± 0.066
0.629LysMet: 0.629 ± 0.024
0.789LysAsn: 0.789 ± 0.027
1.877LysPro: 1.877 ± 0.048
1.021LysGln: 1.021 ± 0.03
1.899LysArg: 1.899 ± 0.048
1.371LysSer: 1.371 ± 0.037
1.609LysThr: 1.609 ± 0.038
2.043LysVal: 2.043 ± 0.052
0.279LysTrp: 0.279 ± 0.015
0.491LysTyr: 0.491 ± 0.022
0.0LysXaa: 0.0 ± 0.0
Leu
17.405LeuAla: 17.405 ± 0.197
0.971LeuCys: 0.971 ± 0.031
5.421LeuAsp: 5.421 ± 0.072
4.778LeuGlu: 4.778 ± 0.062
3.272LeuPhe: 3.272 ± 0.06
9.516LeuGly: 9.516 ± 0.112
2.608LeuHis: 2.608 ± 0.049
3.422LeuIle: 3.422 ± 0.045
3.255LeuLys: 3.255 ± 0.069
12.519LeuLeu: 12.519 ± 0.168
2.542LeuMet: 2.542 ± 0.048
2.742LeuAsn: 2.742 ± 0.053
7.205LeuPro: 7.205 ± 0.087
6.028LeuGln: 6.028 ± 0.091
8.826LeuArg: 8.826 ± 0.101
5.779LeuSer: 5.779 ± 0.126
5.193LeuThr: 5.193 ± 0.127
8.395LeuVal: 8.395 ± 0.091
1.566LeuTrp: 1.566 ± 0.043
1.891LeuTyr: 1.891 ± 0.037
0.0LeuXaa: 0.0 ± 0.0
Met
3.031MetAla: 3.031 ± 0.052
0.127MetCys: 0.127 ± 0.011
1.014MetAsp: 1.014 ± 0.027
0.822MetGlu: 0.822 ± 0.03
0.623MetPhe: 0.623 ± 0.023
1.708MetGly: 1.708 ± 0.038
0.479MetHis: 0.479 ± 0.02
0.643MetIle: 0.643 ± 0.025
0.94MetLys: 0.94 ± 0.032
2.369MetLeu: 2.369 ± 0.045
0.459MetMet: 0.459 ± 0.021
0.814MetAsn: 0.814 ± 0.023
1.413MetPro: 1.413 ± 0.034
1.019MetGln: 1.019 ± 0.032
1.553MetArg: 1.553 ± 0.031
1.354MetSer: 1.354 ± 0.032
1.146MetThr: 1.146 ± 0.029
1.565MetVal: 1.565 ± 0.039
0.187MetTrp: 0.187 ± 0.012
0.318MetTyr: 0.318 ± 0.018
0.0MetXaa: 0.0 ± 0.0
Asn
3.268AsnAla: 3.268 ± 0.061
0.234AsnCys: 0.234 ± 0.013
1.161AsnAsp: 1.161 ± 0.035
1.144AsnGlu: 1.144 ± 0.032
0.951AsnPhe: 0.951 ± 0.032
2.12AsnGly: 2.12 ± 0.059
0.468AsnHis: 0.468 ± 0.017
0.988AsnIle: 0.988 ± 0.03
0.667AsnLys: 0.667 ± 0.023
2.427AsnLeu: 2.427 ± 0.044
0.397AsnMet: 0.397 ± 0.02
0.766AsnAsn: 0.766 ± 0.028
1.733AsnPro: 1.733 ± 0.038
0.789AsnGln: 0.789 ± 0.028
1.482AsnArg: 1.482 ± 0.031
1.1AsnSer: 1.1 ± 0.042
1.561AsnThr: 1.561 ± 0.05
1.744AsnVal: 1.744 ± 0.043
0.357AsnTrp: 0.357 ± 0.019
0.588AsnTyr: 0.588 ± 0.026
0.0AsnXaa: 0.0 ± 0.0
Pro
9.46ProAla: 9.46 ± 0.116
0.367ProCys: 0.367 ± 0.016
2.796ProAsp: 2.796 ± 0.046
3.575ProGlu: 3.575 ± 0.054
1.662ProPhe: 1.662 ± 0.037
5.577ProGly: 5.577 ± 0.084
1.105ProHis: 1.105 ± 0.031
1.474ProIle: 1.474 ± 0.041
1.298ProLys: 1.298 ± 0.034
6.011ProLeu: 6.011 ± 0.081
1.253ProMet: 1.253 ± 0.033
1.165ProAsn: 1.165 ± 0.033
3.468ProPro: 3.468 ± 0.082
2.275ProGln: 2.275 ± 0.042
3.441ProArg: 3.441 ± 0.062
2.519ProSer: 2.519 ± 0.044
2.734ProThr: 2.734 ± 0.045
4.541ProVal: 4.541 ± 0.062
0.939ProTrp: 0.939 ± 0.027
1.07ProTyr: 1.07 ± 0.032
0.0ProXaa: 0.0 ± 0.0
Gln
7.311GlnAla: 7.311 ± 0.111
0.279GlnCys: 0.279 ± 0.014
1.487GlnAsp: 1.487 ± 0.034
1.384GlnGlu: 1.384 ± 0.037
1.176GlnPhe: 1.176 ± 0.032
3.715GlnGly: 3.715 ± 0.059
1.09GlnHis: 1.09 ± 0.031
1.518GlnIle: 1.518 ± 0.075
0.857GlnLys: 0.857 ± 0.028
4.722GlnLeu: 4.722 ± 0.094
0.953GlnMet: 0.953 ± 0.031
0.785GlnAsn: 0.785 ± 0.026
2.76GlnPro: 2.76 ± 0.047
2.254GlnGln: 2.254 ± 0.058
4.478GlnArg: 4.478 ± 0.066
1.566GlnSer: 1.566 ± 0.045
1.992GlnThr: 1.992 ± 0.041
3.314GlnVal: 3.314 ± 0.072
0.636GlnTrp: 0.636 ± 0.023
0.648GlnTyr: 0.648 ± 0.028
0.0GlnXaa: 0.0 ± 0.0
Arg
8.952ArgAla: 8.952 ± 0.116
0.661ArgCys: 0.661 ± 0.022
3.239ArgAsp: 3.239 ± 0.055
4.46ArgGlu: 4.46 ± 0.072
2.636ArgPhe: 2.636 ± 0.043
5.206ArgGly: 5.206 ± 0.068
1.982ArgHis: 1.982 ± 0.048
2.822ArgIle: 2.822 ± 0.045
1.666ArgLys: 1.666 ± 0.043
8.89ArgLeu: 8.89 ± 0.093
1.656ArgMet: 1.656 ± 0.037
1.639ArgAsn: 1.639 ± 0.034
3.652ArgPro: 3.652 ± 0.057
3.168ArgGln: 3.168 ± 0.055
5.581ArgArg: 5.581 ± 0.081
3.646ArgSer: 3.646 ± 0.056
3.222ArgThr: 3.222 ± 0.055
5.67ArgVal: 5.67 ± 0.064
1.502ArgTrp: 1.502 ± 0.038
1.731ArgTyr: 1.731 ± 0.036
0.0ArgXaa: 0.0 ± 0.0
Ser
6.856SerAla: 6.856 ± 0.118
0.413SerCys: 0.413 ± 0.019
2.166SerAsp: 2.166 ± 0.042
2.235SerGlu: 2.235 ± 0.04
2.003SerPhe: 2.003 ± 0.041
5.047SerGly: 5.047 ± 0.127
0.999SerHis: 0.999 ± 0.028
1.862SerIle: 1.862 ± 0.048
1.152SerLys: 1.152 ± 0.032
5.199SerLeu: 5.199 ± 0.067
1.057SerMet: 1.057 ± 0.03
1.273SerAsn: 1.273 ± 0.041
2.661SerPro: 2.661 ± 0.047
1.622SerGln: 1.622 ± 0.041
3.152SerArg: 3.152 ± 0.055
2.729SerSer: 2.729 ± 0.065
3.025SerThr: 3.025 ± 0.084
3.765SerVal: 3.765 ± 0.066
0.691SerTrp: 0.691 ± 0.022
1.109SerTyr: 1.109 ± 0.037
0.0SerXaa: 0.0 ± 0.0
Thr
7.041ThrAla: 7.041 ± 0.165
0.337ThrCys: 0.337 ± 0.018
2.281ThrAsp: 2.281 ± 0.048
2.486ThrGlu: 2.486 ± 0.048
1.46ThrPhe: 1.46 ± 0.034
4.994ThrGly: 4.994 ± 0.112
1.091ThrHis: 1.091 ± 0.028
1.572ThrIle: 1.572 ± 0.038
1.055ThrLys: 1.055 ± 0.036
7.243ThrLeu: 7.243 ± 0.139
0.953ThrMet: 0.953 ± 0.024
1.116ThrAsn: 1.116 ± 0.034
3.785ThrPro: 3.785 ± 0.06
2.033ThrGln: 2.033 ± 0.058
3.443ThrArg: 3.443 ± 0.056
2.38ThrSer: 2.38 ± 0.054
2.774ThrThr: 2.774 ± 0.103
4.56ThrVal: 4.56 ± 0.092
0.752ThrTrp: 0.752 ± 0.023
0.964ThrTyr: 0.964 ± 0.034
0.0ThrXaa: 0.0 ± 0.0
Val
10.422ValAla: 10.422 ± 0.106
0.691ValCys: 0.691 ± 0.026
3.878ValAsp: 3.878 ± 0.05
3.791ValGlu: 3.791 ± 0.063
2.737ValPhe: 2.737 ± 0.042
5.741ValGly: 5.741 ± 0.077
1.719ValHis: 1.719 ± 0.043
2.831ValIle: 2.831 ± 0.05
2.214ValLys: 2.214 ± 0.055
9.378ValLeu: 9.378 ± 0.105
1.87ValMet: 1.87 ± 0.042
2.115ValAsn: 2.115 ± 0.052
4.339ValPro: 4.339 ± 0.068
3.656ValGln: 3.656 ± 0.053
5.13ValArg: 5.13 ± 0.063
3.786ValSer: 3.786 ± 0.075
3.795ValThr: 3.795 ± 0.064
6.563ValVal: 6.563 ± 0.094
1.106ValTrp: 1.106 ± 0.03
1.543ValTyr: 1.543 ± 0.041
0.0ValXaa: 0.0 ± 0.0
Trp
1.927TrpAla: 1.927 ± 0.047
0.182TrpCys: 0.182 ± 0.012
0.602TrpAsp: 0.602 ± 0.022
0.522TrpGlu: 0.522 ± 0.018
0.563TrpPhe: 0.563 ± 0.023
1.087TrpGly: 1.087 ± 0.031
0.408TrpHis: 0.408 ± 0.018
0.47TrpIle: 0.47 ± 0.02
0.375TrpLys: 0.375 ± 0.019
2.242TrpLeu: 2.242 ± 0.053
0.421TrpMet: 0.421 ± 0.018
0.384TrpAsn: 0.384 ± 0.017
0.871TrpPro: 0.871 ± 0.026
0.965TrpGln: 0.965 ± 0.028
1.477TrpArg: 1.477 ± 0.042
0.661TrpSer: 0.661 ± 0.023
0.687TrpThr: 0.687 ± 0.025
1.222TrpVal: 1.222 ± 0.033
0.331TrpTrp: 0.331 ± 0.018
0.274TrpTyr: 0.274 ± 0.015
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.5TyrAla: 2.5 ± 0.047
0.197TyrCys: 0.197 ± 0.011
1.048TyrAsp: 1.048 ± 0.036
0.99TyrGlu: 0.99 ± 0.026
0.783TyrPhe: 0.783 ± 0.022
1.902TyrGly: 1.902 ± 0.043
0.379TyrHis: 0.379 ± 0.017
0.696TyrIle: 0.696 ± 0.024
0.527TyrLys: 0.527 ± 0.021
2.06TyrLeu: 2.06 ± 0.037
0.329TyrMet: 0.329 ± 0.015
0.564TyrAsn: 0.564 ± 0.025
0.876TyrPro: 0.876 ± 0.027
0.672TyrGln: 0.672 ± 0.023
1.588TyrArg: 1.588 ± 0.036
1.037TyrSer: 1.037 ± 0.031
1.334TyrThr: 1.334 ± 0.035
1.412TyrVal: 1.412 ± 0.035
0.313TyrTrp: 0.313 ± 0.016
0.492TyrTyr: 0.492 ± 0.022
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 3930 proteins (1366771 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