Amino acid dipepetide frequency for Rhodoferax sp. TH121

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
16.591AlaAla: 16.591 ± 0.18
1.316AlaCys: 1.316 ± 0.037
6.314AlaAsp: 6.314 ± 0.084
6.226AlaGlu: 6.226 ± 0.095
3.952AlaPhe: 3.952 ± 0.065
9.799AlaGly: 9.799 ± 0.141
2.866AlaHis: 2.866 ± 0.059
5.071AlaIle: 5.071 ± 0.077
4.937AlaLys: 4.937 ± 0.088
15.174AlaLeu: 15.174 ± 0.14
3.739AlaMet: 3.739 ± 0.056
3.264AlaAsn: 3.264 ± 0.066
5.863AlaPro: 5.863 ± 0.083
6.808AlaGln: 6.808 ± 0.101
7.394AlaArg: 7.394 ± 0.081
6.889AlaSer: 6.889 ± 0.102
6.478AlaThr: 6.478 ± 0.099
9.127AlaVal: 9.127 ± 0.104
2.008AlaTrp: 2.008 ± 0.044
2.561AlaTyr: 2.561 ± 0.047
0.0AlaXaa: 0.0 ± 0.0
Cys
1.179CysAla: 1.179 ± 0.036
0.112CysCys: 0.112 ± 0.01
0.513CysAsp: 0.513 ± 0.02
0.485CysGlu: 0.485 ± 0.019
0.295CysPhe: 0.295 ± 0.018
0.958CysGly: 0.958 ± 0.034
0.261CysHis: 0.261 ± 0.015
0.426CysIle: 0.426 ± 0.018
0.307CysLys: 0.307 ± 0.017
0.872CysLeu: 0.872 ± 0.027
0.237CysMet: 0.237 ± 0.013
0.247CysAsn: 0.247 ± 0.017
0.469CysPro: 0.469 ± 0.022
0.281CysGln: 0.281 ± 0.015
0.485CysArg: 0.485 ± 0.021
0.564CysSer: 0.564 ± 0.019
0.52CysThr: 0.52 ± 0.022
0.803CysVal: 0.803 ± 0.027
0.124CysTrp: 0.124 ± 0.011
0.223CysTyr: 0.223 ± 0.014
0.0CysXaa: 0.0 ± 0.0
Asp
6.927AspAla: 6.927 ± 0.09
0.46AspCys: 0.46 ± 0.02
2.485AspAsp: 2.485 ± 0.057
2.757AspGlu: 2.757 ± 0.052
2.005AspPhe: 2.005 ± 0.042
4.183AspGly: 4.183 ± 0.064
1.068AspHis: 1.068 ± 0.031
2.495AspIle: 2.495 ± 0.045
1.957AspLys: 1.957 ± 0.053
5.168AspLeu: 5.168 ± 0.075
1.289AspMet: 1.289 ± 0.036
1.308AspAsn: 1.308 ± 0.031
2.488AspPro: 2.488 ± 0.045
1.758AspGln: 1.758 ± 0.04
2.748AspArg: 2.748 ± 0.049
2.426AspSer: 2.426 ± 0.047
2.787AspThr: 2.787 ± 0.07
4.126AspVal: 4.126 ± 0.063
0.946AspTrp: 0.946 ± 0.031
1.37AspTyr: 1.37 ± 0.033
0.0AspXaa: 0.0 ± 0.0
Glu
6.246GluAla: 6.246 ± 0.082
0.389GluCys: 0.389 ± 0.02
2.237GluAsp: 2.237 ± 0.05
2.45GluGlu: 2.45 ± 0.051
1.911GluPhe: 1.911 ± 0.042
3.636GluGly: 3.636 ± 0.056
1.206GluHis: 1.206 ± 0.031
2.531GluIle: 2.531 ± 0.061
2.067GluLys: 2.067 ± 0.052
5.688GluLeu: 5.688 ± 0.081
1.253GluMet: 1.253 ± 0.034
1.245GluAsn: 1.245 ± 0.035
2.276GluPro: 2.276 ± 0.049
2.532GluGln: 2.532 ± 0.052
3.827GluArg: 3.827 ± 0.068
2.734GluSer: 2.734 ± 0.051
2.481GluThr: 2.481 ± 0.055
4.113GluVal: 4.113 ± 0.069
0.681GluTrp: 0.681 ± 0.023
1.066GluTyr: 1.066 ± 0.027
0.0GluXaa: 0.0 ± 0.0
Phe
4.285PheAla: 4.285 ± 0.062
0.396PheCys: 0.396 ± 0.021
2.426PheAsp: 2.426 ± 0.042
2.041PheGlu: 2.041 ± 0.042
1.4PhePhe: 1.4 ± 0.042
3.205PheGly: 3.205 ± 0.059
0.689PheHis: 0.689 ± 0.025
1.503PheIle: 1.503 ± 0.042
1.434PheLys: 1.434 ± 0.034
2.93PheLeu: 2.93 ± 0.051
0.858PheMet: 0.858 ± 0.026
1.147PheAsn: 1.147 ± 0.03
1.426PhePro: 1.426 ± 0.034
1.105PheGln: 1.105 ± 0.028
1.581PheArg: 1.581 ± 0.039
2.205PheSer: 2.205 ± 0.048
2.029PheThr: 2.029 ± 0.043
2.944PheVal: 2.944 ± 0.055
0.529PheTrp: 0.529 ± 0.022
0.887PheTyr: 0.887 ± 0.026
0.001PheXaa: 0.001 ± 0.001
Gly
9.054GlyAla: 9.054 ± 0.132
0.885GlyCys: 0.885 ± 0.029
3.721GlyAsp: 3.721 ± 0.074
4.058GlyGlu: 4.058 ± 0.062
3.188GlyPhe: 3.188 ± 0.059
6.689GlyGly: 6.689 ± 0.114
1.947GlyHis: 1.947 ± 0.044
3.912GlyIle: 3.912 ± 0.061
3.665GlyLys: 3.665 ± 0.067
8.877GlyLeu: 8.877 ± 0.103
2.336GlyMet: 2.336 ± 0.048
2.435GlyAsn: 2.435 ± 0.084
2.758GlyPro: 2.758 ± 0.046
3.55GlyGln: 3.55 ± 0.056
4.611GlyArg: 4.611 ± 0.073
4.614GlySer: 4.614 ± 0.096
4.447GlyThr: 4.447 ± 0.091
6.723GlyVal: 6.723 ± 0.073
1.415GlyTrp: 1.415 ± 0.037
2.294GlyTyr: 2.294 ± 0.048
0.0GlyXaa: 0.0 ± 0.0
His
2.82HisAla: 2.82 ± 0.057
0.313HisCys: 0.313 ± 0.016
1.057HisAsp: 1.057 ± 0.029
0.98HisGlu: 0.98 ± 0.034
0.909HisPhe: 0.909 ± 0.028
2.033HisGly: 2.033 ± 0.047
0.673HisHis: 0.673 ± 0.031
1.066HisIle: 1.066 ± 0.032
0.702HisLys: 0.702 ± 0.026
2.267HisLeu: 2.267 ± 0.048
0.566HisMet: 0.566 ± 0.024
0.58HisAsn: 0.58 ± 0.024
1.451HisPro: 1.451 ± 0.033
0.875HisGln: 0.875 ± 0.025
1.317HisArg: 1.317 ± 0.032
1.169HisSer: 1.169 ± 0.038
1.39HisThr: 1.39 ± 0.039
1.519HisVal: 1.519 ± 0.038
0.462HisTrp: 0.462 ± 0.02
0.682HisTyr: 0.682 ± 0.022
0.0HisXaa: 0.0 ± 0.0
Ile
6.09IleAla: 6.09 ± 0.085
0.43IleCys: 0.43 ± 0.022
2.649IleAsp: 2.649 ± 0.049
2.764IleGlu: 2.764 ± 0.062
1.283IlePhe: 1.283 ± 0.036
3.74IleGly: 3.74 ± 0.065
0.906IleHis: 0.906 ± 0.027
1.621IleIle: 1.621 ± 0.047
1.724IleLys: 1.724 ± 0.046
3.416IleLeu: 3.416 ± 0.054
0.827IleMet: 0.827 ± 0.026
1.528IleAsn: 1.528 ± 0.035
2.054IlePro: 2.054 ± 0.038
1.444IleGln: 1.444 ± 0.041
2.364IleArg: 2.364 ± 0.044
2.541IleSer: 2.541 ± 0.048
2.772IleThr: 2.772 ± 0.07
3.239IleVal: 3.239 ± 0.06
0.465IleTrp: 0.465 ± 0.022
1.0IleTyr: 1.0 ± 0.03
0.0IleXaa: 0.0 ± 0.0
Lys
4.745LysAla: 4.745 ± 0.082
0.192LysCys: 0.192 ± 0.013
2.013LysAsp: 2.013 ± 0.041
1.78LysGlu: 1.78 ± 0.045
1.093LysPhe: 1.093 ± 0.034
2.853LysGly: 2.853 ± 0.068
0.777LysHis: 0.777 ± 0.023
1.657LysIle: 1.657 ± 0.046
1.744LysLys: 1.744 ± 0.057
4.026LysLeu: 4.026 ± 0.076
0.982LysMet: 0.982 ± 0.033
1.169LysAsn: 1.169 ± 0.035
2.258LysPro: 2.258 ± 0.05
1.418LysGln: 1.418 ± 0.036
2.267LysArg: 2.267 ± 0.047
2.081LysSer: 2.081 ± 0.043
2.348LysThr: 2.348 ± 0.048
3.075LysVal: 3.075 ± 0.058
0.378LysTrp: 0.378 ± 0.018
0.72LysTyr: 0.72 ± 0.025
0.0LysXaa: 0.0 ± 0.0
Leu
14.457LeuAla: 14.457 ± 0.141
1.082LeuCys: 1.082 ± 0.036
5.766LeuAsp: 5.766 ± 0.073
5.248LeuGlu: 5.248 ± 0.065
3.398LeuPhe: 3.398 ± 0.059
8.941LeuGly: 8.941 ± 0.111
2.51LeuHis: 2.51 ± 0.048
4.072LeuIle: 4.072 ± 0.069
4.004LeuLys: 4.004 ± 0.072
11.429LeuLeu: 11.429 ± 0.148
2.747LeuMet: 2.747 ± 0.044
3.085LeuAsn: 3.085 ± 0.05
5.861LeuPro: 5.861 ± 0.077
5.278LeuGln: 5.278 ± 0.068
7.137LeuArg: 7.137 ± 0.085
6.213LeuSer: 6.213 ± 0.081
5.51LeuThr: 5.51 ± 0.091
8.389LeuVal: 8.389 ± 0.108
1.531LeuTrp: 1.531 ± 0.045
2.036LeuTyr: 2.036 ± 0.045
0.0LeuXaa: 0.0 ± 0.0
Met
3.494MetAla: 3.494 ± 0.057
0.173MetCys: 0.173 ± 0.014
1.312MetAsp: 1.312 ± 0.036
1.205MetGlu: 1.205 ± 0.034
0.767MetPhe: 0.767 ± 0.028
2.182MetGly: 2.182 ± 0.049
0.591MetHis: 0.591 ± 0.022
0.819MetIle: 0.819 ± 0.031
1.047MetLys: 1.047 ± 0.03
2.718MetLeu: 2.718 ± 0.052
0.579MetMet: 0.579 ± 0.022
0.808MetAsn: 0.808 ± 0.023
1.475MetPro: 1.475 ± 0.037
1.245MetGln: 1.245 ± 0.034
1.644MetArg: 1.644 ± 0.039
1.554MetSer: 1.554 ± 0.036
1.493MetThr: 1.493 ± 0.037
2.137MetVal: 2.137 ± 0.038
0.231MetTrp: 0.231 ± 0.014
0.418MetTyr: 0.418 ± 0.017
0.0MetXaa: 0.0 ± 0.0
Asn
3.591AsnAla: 3.591 ± 0.071
0.269AsnCys: 0.269 ± 0.015
1.455AsnAsp: 1.455 ± 0.048
1.241AsnGlu: 1.241 ± 0.038
1.062AsnPhe: 1.062 ± 0.032
2.315AsnGly: 2.315 ± 0.06
0.569AsnHis: 0.569 ± 0.025
1.342AsnIle: 1.342 ± 0.036
0.94AsnLys: 0.94 ± 0.029
2.852AsnLeu: 2.852 ± 0.052
0.666AsnMet: 0.666 ± 0.024
0.86AsnAsn: 0.86 ± 0.034
1.891AsnPro: 1.891 ± 0.043
1.049AsnGln: 1.049 ± 0.032
1.591AsnArg: 1.591 ± 0.035
1.426AsnSer: 1.426 ± 0.054
1.838AsnThr: 1.838 ± 0.055
2.088AsnVal: 2.088 ± 0.045
0.44AsnTrp: 0.44 ± 0.022
0.722AsnTyr: 0.722 ± 0.025
0.0AsnXaa: 0.0 ± 0.0
Pro
6.457ProAla: 6.457 ± 0.098
0.368ProCys: 0.368 ± 0.017
2.766ProAsp: 2.766 ± 0.05
3.118ProGlu: 3.118 ± 0.048
1.697ProPhe: 1.697 ± 0.037
3.994ProGly: 3.994 ± 0.061
1.165ProHis: 1.165 ± 0.034
1.864ProIle: 1.864 ± 0.043
1.778ProLys: 1.778 ± 0.041
5.221ProLeu: 5.221 ± 0.07
1.333ProMet: 1.333 ± 0.03
1.342ProAsn: 1.342 ± 0.036
2.249ProPro: 2.249 ± 0.053
2.279ProGln: 2.279 ± 0.045
2.467ProArg: 2.467 ± 0.055
2.687ProSer: 2.687 ± 0.049
2.657ProThr: 2.657 ± 0.045
4.099ProVal: 4.099 ± 0.059
0.86ProTrp: 0.86 ± 0.029
1.072ProTyr: 1.072 ± 0.029
0.0ProXaa: 0.0 ± 0.0
Gln
6.333GlnAla: 6.333 ± 0.089
0.345GlnCys: 0.345 ± 0.018
1.915GlnAsp: 1.915 ± 0.038
1.876GlnGlu: 1.876 ± 0.043
1.461GlnPhe: 1.461 ± 0.03
3.573GlnGly: 3.573 ± 0.059
1.123GlnHis: 1.123 ± 0.032
1.845GlnIle: 1.845 ± 0.044
1.309GlnLys: 1.309 ± 0.038
4.607GlnLeu: 4.607 ± 0.072
1.055GlnMet: 1.055 ± 0.026
1.003GlnAsn: 1.003 ± 0.028
2.249GlnPro: 2.249 ± 0.046
2.137GlnGln: 2.137 ± 0.044
3.471GlnArg: 3.471 ± 0.063
2.378GlnSer: 2.378 ± 0.043
2.453GlnThr: 2.453 ± 0.048
3.311GlnVal: 3.311 ± 0.057
0.822GlnTrp: 0.822 ± 0.024
0.858GlnTyr: 0.858 ± 0.028
0.0GlnXaa: 0.0 ± 0.0
Arg
6.845ArgAla: 6.845 ± 0.091
0.522ArgCys: 0.522 ± 0.021
3.006ArgAsp: 3.006 ± 0.053
3.369ArgGlu: 3.369 ± 0.056
2.353ArgPhe: 2.353 ± 0.054
4.022ArgGly: 4.022 ± 0.059
1.53ArgHis: 1.53 ± 0.039
3.029ArgIle: 3.029 ± 0.051
2.274ArgLys: 2.274 ± 0.046
6.795ArgLeu: 6.795 ± 0.082
1.848ArgMet: 1.848 ± 0.04
1.791ArgAsn: 1.791 ± 0.035
2.656ArgPro: 2.656 ± 0.049
2.638ArgGln: 2.638 ± 0.054
3.71ArgArg: 3.71 ± 0.067
3.32ArgSer: 3.32 ± 0.057
3.156ArgThr: 3.156 ± 0.053
4.501ArgVal: 4.501 ± 0.061
1.086ArgTrp: 1.086 ± 0.034
1.622ArgTyr: 1.622 ± 0.037
0.0ArgXaa: 0.0 ± 0.0
Ser
6.822SerAla: 6.822 ± 0.088
0.473SerCys: 0.473 ± 0.018
2.603SerAsp: 2.603 ± 0.048
2.527SerGlu: 2.527 ± 0.049
2.085SerPhe: 2.085 ± 0.043
5.224SerGly: 5.224 ± 0.099
1.247SerHis: 1.247 ± 0.034
2.585SerIle: 2.585 ± 0.051
2.023SerLys: 2.023 ± 0.044
5.889SerLeu: 5.889 ± 0.084
1.432SerMet: 1.432 ± 0.03
1.64SerAsn: 1.64 ± 0.057
2.815SerPro: 2.815 ± 0.056
2.125SerGln: 2.125 ± 0.048
3.085SerArg: 3.085 ± 0.052
3.287SerSer: 3.287 ± 0.074
3.278SerThr: 3.278 ± 0.064
4.167SerVal: 4.167 ± 0.063
0.741SerTrp: 0.741 ± 0.025
1.326SerTyr: 1.326 ± 0.037
0.0SerXaa: 0.0 ± 0.0
Thr
6.388ThrAla: 6.388 ± 0.108
0.404ThrCys: 0.404 ± 0.022
2.587ThrAsp: 2.587 ± 0.044
2.734ThrGlu: 2.734 ± 0.046
1.834ThrPhe: 1.834 ± 0.044
4.733ThrGly: 4.733 ± 0.102
1.272ThrHis: 1.272 ± 0.032
2.274ThrIle: 2.274 ± 0.057
1.63ThrLys: 1.63 ± 0.039
7.125ThrLeu: 7.125 ± 0.149
1.229ThrMet: 1.229 ± 0.035
1.39ThrAsn: 1.39 ± 0.046
3.583ThrPro: 3.583 ± 0.05
2.317ThrGln: 2.317 ± 0.05
3.035ThrArg: 3.035 ± 0.056
2.837ThrSer: 2.837 ± 0.055
3.096ThrThr: 3.096 ± 0.077
4.66ThrVal: 4.66 ± 0.076
0.718ThrTrp: 0.718 ± 0.025
1.135ThrTyr: 1.135 ± 0.038
0.0ThrXaa: 0.0 ± 0.0
Val
9.801ValAla: 9.801 ± 0.106
0.8ValCys: 0.8 ± 0.027
4.164ValAsp: 4.164 ± 0.062
4.063ValGlu: 4.063 ± 0.069
2.838ValPhe: 2.838 ± 0.043
6.05ValGly: 6.05 ± 0.076
1.639ValHis: 1.639 ± 0.036
3.299ValIle: 3.299 ± 0.062
2.707ValLys: 2.707 ± 0.057
8.944ValLeu: 8.944 ± 0.114
1.999ValMet: 1.999 ± 0.045
2.281ValAsn: 2.281 ± 0.048
3.795ValPro: 3.795 ± 0.061
3.496ValGln: 3.496 ± 0.058
4.74ValArg: 4.74 ± 0.056
4.355ValSer: 4.355 ± 0.064
4.131ValThr: 4.131 ± 0.069
6.945ValVal: 6.945 ± 0.097
1.161ValTrp: 1.161 ± 0.033
1.638ValTyr: 1.638 ± 0.03
0.0ValXaa: 0.0 ± 0.0
Trp
1.617TrpAla: 1.617 ± 0.045
0.178TrpCys: 0.178 ± 0.011
0.672TrpAsp: 0.672 ± 0.023
0.565TrpGlu: 0.565 ± 0.023
0.554TrpPhe: 0.554 ± 0.022
1.081TrpGly: 1.081 ± 0.034
0.37TrpHis: 0.37 ± 0.018
0.63TrpIle: 0.63 ± 0.024
0.512TrpLys: 0.512 ± 0.02
2.176TrpLeu: 2.176 ± 0.053
0.451TrpMet: 0.451 ± 0.021
0.453TrpAsn: 0.453 ± 0.019
0.71TrpPro: 0.71 ± 0.026
0.768TrpGln: 0.768 ± 0.026
1.089TrpArg: 1.089 ± 0.033
0.828TrpSer: 0.828 ± 0.027
0.794TrpThr: 0.794 ± 0.025
1.247TrpVal: 1.247 ± 0.037
0.321TrpTrp: 0.321 ± 0.015
0.296TrpTyr: 0.296 ± 0.016
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.638TyrAla: 2.638 ± 0.049
0.255TyrCys: 0.255 ± 0.015
1.092TyrAsp: 1.092 ± 0.035
1.082TyrGlu: 1.082 ± 0.031
0.936TyrPhe: 0.936 ± 0.03
1.969TyrGly: 1.969 ± 0.042
0.418TyrHis: 0.418 ± 0.021
0.816TyrIle: 0.816 ± 0.025
0.814TyrLys: 0.814 ± 0.029
2.519TyrLeu: 2.519 ± 0.049
0.465TyrMet: 0.465 ± 0.019
0.631TyrAsn: 0.631 ± 0.025
1.149TyrPro: 1.149 ± 0.034
1.02TyrGln: 1.02 ± 0.032
1.51TyrArg: 1.51 ± 0.042
1.261TyrSer: 1.261 ± 0.034
1.32TyrThr: 1.32 ± 0.038
1.635TyrVal: 1.635 ± 0.038
0.394TyrTrp: 0.394 ± 0.02
0.566TyrTyr: 0.566 ± 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
0.001XaaLys: 0.001 ± 0.001
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 3722 proteins (1226084 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