Amino acid dipepetide frequency for Pleurocapsa sp. PCC 7327

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
7.892AlaAla: 7.892 ± 0.11
0.951AlaCys: 0.951 ± 0.026
3.898AlaAsp: 3.898 ± 0.063
5.264AlaGlu: 5.264 ± 0.066
3.236AlaPhe: 3.236 ± 0.057
5.768AlaGly: 5.768 ± 0.09
1.257AlaHis: 1.257 ± 0.038
8.148AlaIle: 8.148 ± 0.093
4.406AlaLys: 4.406 ± 0.062
9.021AlaLeu: 9.021 ± 0.098
1.773AlaMet: 1.773 ± 0.038
3.364AlaAsn: 3.364 ± 0.078
3.005AlaPro: 3.005 ± 0.055
4.408AlaGln: 4.408 ± 0.062
4.541AlaArg: 4.541 ± 0.059
5.177AlaSer: 5.177 ± 0.065
4.65AlaThr: 4.65 ± 0.061
5.405AlaVal: 5.405 ± 0.067
1.151AlaTrp: 1.151 ± 0.034
2.422AlaTyr: 2.422 ± 0.045
0.0AlaXaa: 0.0 ± 0.0
Cys
0.703CysAla: 0.703 ± 0.027
0.162CysCys: 0.162 ± 0.012
0.644CysAsp: 0.644 ± 0.023
0.536CysGlu: 0.536 ± 0.019
0.439CysPhe: 0.439 ± 0.017
0.857CysGly: 0.857 ± 0.026
0.317CysHis: 0.317 ± 0.015
0.58CysIle: 0.58 ± 0.019
0.315CysLys: 0.315 ± 0.015
1.238CysLeu: 1.238 ± 0.027
0.168CysMet: 0.168 ± 0.011
0.334CysAsn: 0.334 ± 0.015
0.576CysPro: 0.576 ± 0.021
0.672CysGln: 0.672 ± 0.026
0.619CysArg: 0.619 ± 0.023
0.623CysSer: 0.623 ± 0.022
0.453CysThr: 0.453 ± 0.018
0.558CysVal: 0.558 ± 0.021
0.172CysTrp: 0.172 ± 0.011
0.395CysTyr: 0.395 ± 0.019
0.0CysXaa: 0.0 ± 0.0
Asp
3.51AspAla: 3.51 ± 0.055
0.561AspCys: 0.561 ± 0.019
2.053AspAsp: 2.053 ± 0.052
3.095AspGlu: 3.095 ± 0.057
2.204AspPhe: 2.204 ± 0.042
3.356AspGly: 3.356 ± 0.103
0.458AspHis: 0.458 ± 0.019
3.012AspIle: 3.012 ± 0.055
2.163AspLys: 2.163 ± 0.052
5.857AspLeu: 5.857 ± 0.07
0.717AspMet: 0.717 ± 0.023
1.793AspAsn: 1.793 ± 0.055
2.703AspPro: 2.703 ± 0.053
0.861AspGln: 0.861 ± 0.025
5.236AspArg: 5.236 ± 0.067
2.925AspSer: 2.925 ± 0.07
2.144AspThr: 2.144 ± 0.048
2.651AspVal: 2.651 ± 0.041
1.003AspTrp: 1.003 ± 0.031
1.89AspTyr: 1.89 ± 0.038
0.0AspXaa: 0.0 ± 0.0
Glu
6.115GluAla: 6.115 ± 0.079
0.489GluCys: 0.489 ± 0.019
2.796GluAsp: 2.796 ± 0.048
4.648GluGlu: 4.648 ± 0.082
2.404GluPhe: 2.404 ± 0.043
3.6GluGly: 3.6 ± 0.063
0.942GluHis: 0.942 ± 0.025
5.238GluIle: 5.238 ± 0.064
4.038GluLys: 4.038 ± 0.056
6.94GluLeu: 6.94 ± 0.068
1.353GluMet: 1.353 ± 0.034
2.651GluAsn: 2.651 ± 0.048
2.585GluPro: 2.585 ± 0.047
3.631GluGln: 3.631 ± 0.059
4.285GluArg: 4.285 ± 0.069
3.524GluSer: 3.524 ± 0.055
3.808GluThr: 3.808 ± 0.055
4.342GluVal: 4.342 ± 0.079
0.783GluTrp: 0.783 ± 0.028
1.72GluTyr: 1.72 ± 0.039
0.0GluXaa: 0.0 ± 0.0
Phe
3.148PheAla: 3.148 ± 0.054
0.537PheCys: 0.537 ± 0.02
2.184PheAsp: 2.184 ± 0.043
2.369PheGlu: 2.369 ± 0.048
1.855PhePhe: 1.855 ± 0.042
2.955PheGly: 2.955 ± 0.053
0.714PheHis: 0.714 ± 0.027
2.361PheIle: 2.361 ± 0.05
1.543PheLys: 1.543 ± 0.037
4.484PheLeu: 4.484 ± 0.074
0.669PheMet: 0.669 ± 0.022
1.592PheAsn: 1.592 ± 0.036
1.977PhePro: 1.977 ± 0.042
1.744PheGln: 1.744 ± 0.039
1.941PheArg: 1.941 ± 0.041
2.944PheSer: 2.944 ± 0.054
1.916PheThr: 1.916 ± 0.034
2.508PheVal: 2.508 ± 0.047
0.78PheTrp: 0.78 ± 0.028
1.351PheTyr: 1.351 ± 0.032
0.0PheXaa: 0.0 ± 0.0
Gly
5.299GlyAla: 5.299 ± 0.092
0.831GlyCys: 0.831 ± 0.027
3.414GlyAsp: 3.414 ± 0.063
4.202GlyGlu: 4.202 ± 0.059
2.927GlyPhe: 2.927 ± 0.051
4.867GlyGly: 4.867 ± 0.097
1.219GlyHis: 1.219 ± 0.038
5.479GlyIle: 5.479 ± 0.081
3.987GlyLys: 3.987 ± 0.055
7.031GlyLeu: 7.031 ± 0.081
1.589GlyMet: 1.589 ± 0.035
2.73GlyAsn: 2.73 ± 0.065
1.255GlyPro: 1.255 ± 0.035
2.86GlyGln: 2.86 ± 0.052
3.679GlyArg: 3.679 ± 0.06
4.173GlySer: 4.173 ± 0.071
3.976GlyThr: 3.976 ± 0.058
4.589GlyVal: 4.589 ± 0.065
1.2GlyTrp: 1.2 ± 0.028
2.478GlyTyr: 2.478 ± 0.048
0.0GlyXaa: 0.0 ± 0.0
His
1.142HisAla: 1.142 ± 0.031
0.265HisCys: 0.265 ± 0.015
0.649HisAsp: 0.649 ± 0.022
0.842HisGlu: 0.842 ± 0.028
0.798HisPhe: 0.798 ± 0.024
1.065HisGly: 1.065 ± 0.031
0.533HisHis: 0.533 ± 0.027
0.909HisIle: 0.909 ± 0.029
0.621HisLys: 0.621 ± 0.021
2.253HisLeu: 2.253 ± 0.047
0.241HisMet: 0.241 ± 0.014
0.6HisAsn: 0.6 ± 0.022
1.316HisPro: 1.316 ± 0.034
1.013HisGln: 1.013 ± 0.026
1.134HisArg: 1.134 ± 0.026
1.006HisSer: 1.006 ± 0.029
0.7HisThr: 0.7 ± 0.025
0.824HisVal: 0.824 ± 0.026
0.352HisTrp: 0.352 ± 0.016
0.653HisTyr: 0.653 ± 0.023
0.0HisXaa: 0.0 ± 0.0
Ile
8.04IleAla: 8.04 ± 0.086
0.793IleCys: 0.793 ± 0.026
3.897IleAsp: 3.897 ± 0.056
4.82IleGlu: 4.82 ± 0.062
2.749IlePhe: 2.749 ± 0.054
4.877IleGly: 4.877 ± 0.072
1.142IleHis: 1.142 ± 0.031
3.619IleIle: 3.619 ± 0.064
2.711IleLys: 2.711 ± 0.049
7.278IleLeu: 7.278 ± 0.08
0.849IleMet: 0.849 ± 0.025
2.404IleAsn: 2.404 ± 0.045
3.641IlePro: 3.641 ± 0.052
2.742IleGln: 2.742 ± 0.047
3.526IleArg: 3.526 ± 0.057
4.035IleSer: 4.035 ± 0.052
3.095IleThr: 3.095 ± 0.052
4.936IleVal: 4.936 ± 0.072
0.933IleTrp: 0.933 ± 0.029
2.018IleTyr: 2.018 ± 0.043
0.0IleXaa: 0.0 ± 0.0
Lys
4.31LysAla: 4.31 ± 0.075
0.314LysCys: 0.314 ± 0.015
2.056LysAsp: 2.056 ± 0.042
3.162LysGlu: 3.162 ± 0.056
1.589LysPhe: 1.589 ± 0.04
2.77LysGly: 2.77 ± 0.05
0.758LysHis: 0.758 ± 0.027
3.645LysIle: 3.645 ± 0.061
2.416LysLys: 2.416 ± 0.052
5.227LysLeu: 5.227 ± 0.069
0.938LysMet: 0.938 ± 0.03
1.973LysAsn: 1.973 ± 0.042
2.461LysPro: 2.461 ± 0.046
2.685LysGln: 2.685 ± 0.048
2.698LysArg: 2.698 ± 0.048
2.726LysSer: 2.726 ± 0.049
3.006LysThr: 3.006 ± 0.049
3.145LysVal: 3.145 ± 0.053
0.461LysTrp: 0.461 ± 0.019
1.337LysTyr: 1.337 ± 0.036
0.0LysXaa: 0.0 ± 0.0
Leu
10.454LeuAla: 10.454 ± 0.112
1.116LeuCys: 1.116 ± 0.031
5.505LeuAsp: 5.505 ± 0.069
8.036LeuGlu: 8.036 ± 0.095
4.013LeuPhe: 4.013 ± 0.072
7.917LeuGly: 7.917 ± 0.098
1.741LeuHis: 1.741 ± 0.038
6.839LeuIle: 6.839 ± 0.089
5.935LeuLys: 5.935 ± 0.064
11.88LeuLeu: 11.88 ± 0.138
2.126LeuMet: 2.126 ± 0.044
4.134LeuAsn: 4.134 ± 0.065
5.723LeuPro: 5.723 ± 0.077
5.182LeuGln: 5.182 ± 0.08
5.865LeuArg: 5.865 ± 0.081
7.745LeuSer: 7.745 ± 0.08
6.119LeuThr: 6.119 ± 0.074
7.488LeuVal: 7.488 ± 0.088
1.467LeuTrp: 1.467 ± 0.038
2.829LeuTyr: 2.829 ± 0.053
0.0LeuXaa: 0.0 ± 0.0
Met
1.887MetAla: 1.887 ± 0.041
0.135MetCys: 0.135 ± 0.01
0.689MetAsp: 0.689 ± 0.024
1.046MetGlu: 1.046 ± 0.028
0.525MetPhe: 0.525 ± 0.018
1.516MetGly: 1.516 ± 0.033
0.311MetHis: 0.311 ± 0.015
0.924MetIle: 0.924 ± 0.031
1.018MetLys: 1.018 ± 0.028
1.997MetLeu: 1.997 ± 0.046
0.471MetMet: 0.471 ± 0.022
0.768MetAsn: 0.768 ± 0.024
0.985MetPro: 0.985 ± 0.027
0.844MetGln: 0.844 ± 0.025
1.047MetArg: 1.047 ± 0.028
1.394MetSer: 1.394 ± 0.033
1.367MetThr: 1.367 ± 0.036
1.233MetVal: 1.233 ± 0.04
0.142MetTrp: 0.142 ± 0.008
0.354MetTyr: 0.354 ± 0.018
0.0MetXaa: 0.0 ± 0.0
Asn
2.892AsnAla: 2.892 ± 0.051
0.509AsnCys: 0.509 ± 0.022
1.512AsnAsp: 1.512 ± 0.051
1.767AsnGlu: 1.767 ± 0.037
1.748AsnPhe: 1.748 ± 0.038
2.453AsnGly: 2.453 ± 0.074
0.682AsnHis: 0.682 ± 0.021
2.154AsnIle: 2.154 ± 0.045
1.421AsnLys: 1.421 ± 0.034
5.285AsnLeu: 5.285 ± 0.09
0.609AsnMet: 0.609 ± 0.022
1.629AsnAsn: 1.629 ± 0.042
2.877AsnPro: 2.877 ± 0.053
1.907AsnGln: 1.907 ± 0.038
2.518AsnArg: 2.518 ± 0.04
2.568AsnSer: 2.568 ± 0.048
1.678AsnThr: 1.678 ± 0.037
1.966AsnVal: 1.966 ± 0.044
0.757AsnTrp: 0.757 ± 0.027
1.372AsnTyr: 1.372 ± 0.032
0.0AsnXaa: 0.0 ± 0.0
Pro
3.38ProAla: 3.38 ± 0.05
0.397ProCys: 0.397 ± 0.018
2.88ProAsp: 2.88 ± 0.056
3.955ProGlu: 3.955 ± 0.069
1.88ProPhe: 1.88 ± 0.036
3.064ProGly: 3.064 ± 0.052
0.855ProHis: 0.855 ± 0.027
3.355ProIle: 3.355 ± 0.048
2.271ProLys: 2.271 ± 0.045
4.777ProLeu: 4.777 ± 0.067
0.766ProMet: 0.766 ± 0.029
2.066ProAsn: 2.066 ± 0.041
2.264ProPro: 2.264 ± 0.047
2.43ProGln: 2.43 ± 0.042
1.957ProArg: 1.957 ± 0.035
3.081ProSer: 3.081 ± 0.056
2.754ProThr: 2.754 ± 0.055
3.192ProVal: 3.192 ± 0.054
0.67ProTrp: 0.67 ± 0.027
1.449ProTyr: 1.449 ± 0.033
0.0ProXaa: 0.0 ± 0.0
Gln
4.492GlnAla: 4.492 ± 0.074
0.34GlnCys: 0.34 ± 0.016
1.77GlnAsp: 1.77 ± 0.038
3.693GlnGlu: 3.693 ± 0.055
1.722GlnPhe: 1.722 ± 0.035
2.9GlnGly: 2.9 ± 0.046
0.71GlnHis: 0.71 ± 0.023
3.658GlnIle: 3.658 ± 0.057
2.812GlnLys: 2.812 ± 0.056
5.848GlnLeu: 5.848 ± 0.087
1.09GlnMet: 1.09 ± 0.026
1.746GlnAsn: 1.746 ± 0.042
2.375GlnPro: 2.375 ± 0.045
3.297GlnGln: 3.297 ± 0.069
2.774GlnArg: 2.774 ± 0.054
2.672GlnSer: 2.672 ± 0.05
2.736GlnThr: 2.736 ± 0.043
3.233GlnVal: 3.233 ± 0.046
0.708GlnTrp: 0.708 ± 0.021
1.178GlnTyr: 1.178 ± 0.03
0.0GlnXaa: 0.0 ± 0.0
Arg
4.193ArgAla: 4.193 ± 0.062
0.568ArgCys: 0.568 ± 0.021
3.109ArgAsp: 3.109 ± 0.054
4.042ArgGlu: 4.042 ± 0.05
2.462ArgPhe: 2.462 ± 0.041
3.417ArgGly: 3.417 ± 0.058
1.135ArgHis: 1.135 ± 0.029
3.706ArgIle: 3.706 ± 0.051
2.469ArgLys: 2.469 ± 0.046
6.815ArgLeu: 6.815 ± 0.078
1.163ArgMet: 1.163 ± 0.03
2.069ArgAsn: 2.069 ± 0.039
2.339ArgPro: 2.339 ± 0.05
3.72ArgGln: 3.72 ± 0.049
3.491ArgArg: 3.491 ± 0.049
3.739ArgSer: 3.739 ± 0.057
2.684ArgThr: 2.684 ± 0.042
3.948ArgVal: 3.948 ± 0.058
1.003ArgTrp: 1.003 ± 0.032
2.093ArgTyr: 2.093 ± 0.044
0.0ArgXaa: 0.0 ± 0.0
Ser
4.65SerAla: 4.65 ± 0.062
0.652SerCys: 0.652 ± 0.024
3.293SerAsp: 3.293 ± 0.06
3.923SerGlu: 3.923 ± 0.056
2.535SerPhe: 2.535 ± 0.045
4.372SerGly: 4.372 ± 0.068
1.257SerHis: 1.257 ± 0.033
3.84SerIle: 3.84 ± 0.057
2.564SerLys: 2.564 ± 0.045
7.621SerLeu: 7.621 ± 0.088
1.224SerMet: 1.224 ± 0.031
2.325SerAsn: 2.325 ± 0.047
3.406SerPro: 3.406 ± 0.055
3.708SerGln: 3.708 ± 0.055
3.443SerArg: 3.443 ± 0.052
4.335SerSer: 4.335 ± 0.07
3.056SerThr: 3.056 ± 0.049
3.776SerVal: 3.776 ± 0.053
0.955SerTrp: 0.955 ± 0.032
1.803SerTyr: 1.803 ± 0.035
0.0SerXaa: 0.0 ± 0.0
Thr
4.465ThrAla: 4.465 ± 0.056
0.497ThrCys: 0.497 ± 0.019
2.47ThrAsp: 2.47 ± 0.047
3.148ThrGlu: 3.148 ± 0.046
1.972ThrPhe: 1.972 ± 0.041
4.032ThrGly: 4.032 ± 0.055
0.955ThrHis: 0.955 ± 0.026
3.959ThrIle: 3.959 ± 0.054
2.059ThrLys: 2.059 ± 0.043
6.021ThrLeu: 6.021 ± 0.067
0.769ThrMet: 0.769 ± 0.022
2.033ThrAsn: 2.033 ± 0.039
3.111ThrPro: 3.111 ± 0.055
2.564ThrGln: 2.564 ± 0.048
2.409ThrArg: 2.409 ± 0.044
3.199ThrSer: 3.199 ± 0.049
2.943ThrThr: 2.943 ± 0.053
3.84ThrVal: 3.84 ± 0.052
0.658ThrTrp: 0.658 ± 0.023
1.559ThrTyr: 1.559 ± 0.042
0.0ThrXaa: 0.0 ± 0.0
Val
6.127ValAla: 6.127 ± 0.08
0.705ValCys: 0.705 ± 0.025
3.281ValAsp: 3.281 ± 0.052
4.627ValGlu: 4.627 ± 0.069
2.516ValPhe: 2.516 ± 0.044
4.811ValGly: 4.811 ± 0.069
0.912ValHis: 0.912 ± 0.026
4.08ValIle: 4.08 ± 0.059
3.113ValLys: 3.113 ± 0.049
6.674ValLeu: 6.674 ± 0.085
1.344ValMet: 1.344 ± 0.033
2.446ValAsn: 2.446 ± 0.048
2.954ValPro: 2.954 ± 0.047
2.344ValGln: 2.344 ± 0.04
3.885ValArg: 3.885 ± 0.058
4.161ValSer: 4.161 ± 0.06
3.573ValThr: 3.573 ± 0.056
4.582ValVal: 4.582 ± 0.074
0.826ValTrp: 0.826 ± 0.029
1.806ValTyr: 1.806 ± 0.038
0.0ValXaa: 0.0 ± 0.0
Trp
0.899TrpAla: 0.899 ± 0.027
0.142TrpCys: 0.142 ± 0.01
0.624TrpAsp: 0.624 ± 0.026
0.994TrpGlu: 0.994 ± 0.029
0.633TrpPhe: 0.633 ± 0.022
1.042TrpGly: 1.042 ± 0.03
0.346TrpHis: 0.346 ± 0.016
0.936TrpIle: 0.936 ± 0.027
0.673TrpLys: 0.673 ± 0.026
2.085TrpLeu: 2.085 ± 0.052
0.355TrpMet: 0.355 ± 0.017
0.595TrpAsn: 0.595 ± 0.022
0.205TrpPro: 0.205 ± 0.014
1.264TrpGln: 1.264 ± 0.029
0.918TrpArg: 0.918 ± 0.025
0.879TrpSer: 0.879 ± 0.03
0.638TrpThr: 0.638 ± 0.021
0.912TrpVal: 0.912 ± 0.025
0.276TrpTrp: 0.276 ± 0.017
0.454TrpTyr: 0.454 ± 0.02
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.139TyrAla: 2.139 ± 0.044
0.397TyrCys: 0.397 ± 0.016
1.469TyrAsp: 1.469 ± 0.039
1.723TyrGlu: 1.723 ± 0.039
1.363TyrPhe: 1.363 ± 0.036
2.145TyrGly: 2.145 ± 0.042
0.67TyrHis: 0.67 ± 0.024
1.662TyrIle: 1.662 ± 0.038
1.14TyrLys: 1.14 ± 0.035
3.785TyrLeu: 3.785 ± 0.056
0.436TyrMet: 0.436 ± 0.02
1.052TyrAsn: 1.052 ± 0.031
1.686TyrPro: 1.686 ± 0.042
1.878TyrGln: 1.878 ± 0.04
2.198TyrArg: 2.198 ± 0.047
1.833TyrSer: 1.833 ± 0.042
1.366TyrThr: 1.366 ± 0.035
1.64TyrVal: 1.64 ± 0.036
0.576TyrTrp: 0.576 ± 0.022
1.132TyrTyr: 1.132 ± 0.029
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 4255 proteins (1342602 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