Amino acid dipepetide frequency for Azoarcus sp. KH32C

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
16.918AlaAla: 16.918 ± 0.135
1.37AlaCys: 1.37 ± 0.033
6.74AlaAsp: 6.74 ± 0.066
7.659AlaGlu: 7.659 ± 0.079
4.072AlaPhe: 4.072 ± 0.05
10.652AlaGly: 10.652 ± 0.074
2.519AlaHis: 2.519 ± 0.044
5.767AlaIle: 5.767 ± 0.06
3.655AlaLys: 3.655 ± 0.057
13.502AlaLeu: 13.502 ± 0.125
3.29AlaMet: 3.29 ± 0.044
3.023AlaAsn: 3.023 ± 0.042
5.545AlaPro: 5.545 ± 0.063
4.225AlaGln: 4.225 ± 0.054
9.112AlaArg: 9.112 ± 0.096
6.267AlaSer: 6.267 ± 0.069
5.943AlaThr: 5.943 ± 0.076
8.9AlaVal: 8.9 ± 0.073
1.702AlaTrp: 1.702 ± 0.032
2.485AlaTyr: 2.485 ± 0.041
0.0AlaXaa: 0.0 ± 0.0
Cys
1.227CysAla: 1.227 ± 0.028
0.118CysCys: 0.118 ± 0.01
0.655CysAsp: 0.655 ± 0.019
0.604CysGlu: 0.604 ± 0.018
0.34CysPhe: 0.34 ± 0.014
1.079CysGly: 1.079 ± 0.028
0.378CysHis: 0.378 ± 0.025
0.431CysIle: 0.431 ± 0.015
0.25CysLys: 0.25 ± 0.012
0.897CysLeu: 0.897 ± 0.026
0.203CysMet: 0.203 ± 0.012
0.287CysAsn: 0.287 ± 0.013
0.557CysPro: 0.557 ± 0.02
0.247CysGln: 0.247 ± 0.011
0.756CysArg: 0.756 ± 0.021
0.558CysSer: 0.558 ± 0.019
0.512CysThr: 0.512 ± 0.018
0.777CysVal: 0.777 ± 0.024
0.131CysTrp: 0.131 ± 0.008
0.261CysTyr: 0.261 ± 0.012
0.0CysXaa: 0.0 ± 0.0
Asp
7.117AspAla: 7.117 ± 0.079
0.587AspCys: 0.587 ± 0.016
3.151AspAsp: 3.151 ± 0.052
3.73AspGlu: 3.73 ± 0.05
2.242AspPhe: 2.242 ± 0.036
5.044AspGly: 5.044 ± 0.076
1.16AspHis: 1.16 ± 0.026
2.727AspIle: 2.727 ± 0.042
1.728AspLys: 1.728 ± 0.038
5.565AspLeu: 5.565 ± 0.069
1.14AspMet: 1.14 ± 0.025
1.306AspAsn: 1.306 ± 0.033
3.057AspPro: 3.057 ± 0.043
1.543AspGln: 1.543 ± 0.037
3.917AspArg: 3.917 ± 0.053
2.434AspSer: 2.434 ± 0.037
2.651AspThr: 2.651 ± 0.057
4.165AspVal: 4.165 ± 0.047
0.946AspTrp: 0.946 ± 0.028
1.495AspTyr: 1.495 ± 0.03
0.0AspXaa: 0.0 ± 0.0
Glu
7.454GluAla: 7.454 ± 0.076
0.521GluCys: 0.521 ± 0.019
2.733GluAsp: 2.733 ± 0.045
3.198GluGlu: 3.198 ± 0.056
2.016GluPhe: 2.016 ± 0.031
4.22GluGly: 4.22 ± 0.047
1.496GluHis: 1.496 ± 0.032
3.376GluIle: 3.376 ± 0.049
2.091GluLys: 2.091 ± 0.04
6.671GluLeu: 6.671 ± 0.067
1.466GluMet: 1.466 ± 0.03
1.516GluAsn: 1.516 ± 0.035
2.548GluPro: 2.548 ± 0.05
2.455GluGln: 2.455 ± 0.037
5.566GluArg: 5.566 ± 0.063
2.974GluSer: 2.974 ± 0.041
3.066GluThr: 3.066 ± 0.054
4.421GluVal: 4.421 ± 0.058
0.8GluTrp: 0.8 ± 0.025
1.203GluTyr: 1.203 ± 0.029
0.0GluXaa: 0.0 ± 0.0
Phe
4.437PheAla: 4.437 ± 0.06
0.411PheCys: 0.411 ± 0.016
2.604PheAsp: 2.604 ± 0.047
2.275PheGlu: 2.275 ± 0.042
1.407PhePhe: 1.407 ± 0.031
3.592PheGly: 3.592 ± 0.052
0.807PheHis: 0.807 ± 0.022
1.49PheIle: 1.49 ± 0.031
0.996PheLys: 0.996 ± 0.023
3.249PheLeu: 3.249 ± 0.058
0.807PheMet: 0.807 ± 0.024
1.114PheAsn: 1.114 ± 0.026
1.627PhePro: 1.627 ± 0.033
0.976PheGln: 0.976 ± 0.026
2.375PheArg: 2.375 ± 0.04
2.178PheSer: 2.178 ± 0.039
1.768PheThr: 1.768 ± 0.033
2.996PheVal: 2.996 ± 0.047
0.479PheTrp: 0.479 ± 0.018
0.849PheTyr: 0.849 ± 0.021
0.0PheXaa: 0.0 ± 0.0
Gly
9.012GlyAla: 9.012 ± 0.095
1.015GlyCys: 1.015 ± 0.028
4.309GlyAsp: 4.309 ± 0.059
5.144GlyGlu: 5.144 ± 0.067
3.375GlyPhe: 3.375 ± 0.051
6.987GlyGly: 6.987 ± 0.098
1.97GlyHis: 1.97 ± 0.039
4.449GlyIle: 4.449 ± 0.048
3.315GlyLys: 3.315 ± 0.054
8.54GlyLeu: 8.54 ± 0.084
2.352GlyMet: 2.352 ± 0.041
2.369GlyAsn: 2.369 ± 0.064
2.924GlyPro: 2.924 ± 0.041
2.815GlyGln: 2.815 ± 0.043
6.14GlyArg: 6.14 ± 0.06
4.493GlySer: 4.493 ± 0.062
4.365GlyThr: 4.365 ± 0.084
6.465GlyVal: 6.465 ± 0.061
1.346GlyTrp: 1.346 ± 0.033
2.293GlyTyr: 2.293 ± 0.043
0.0GlyXaa: 0.0 ± 0.0
His
2.647HisAla: 2.647 ± 0.048
0.294HisCys: 0.294 ± 0.012
1.294HisAsp: 1.294 ± 0.029
1.28HisGlu: 1.28 ± 0.027
0.991HisPhe: 0.991 ± 0.024
2.101HisGly: 2.101 ± 0.037
0.621HisHis: 0.621 ± 0.02
0.961HisIle: 0.961 ± 0.027
0.545HisLys: 0.545 ± 0.017
2.358HisLeu: 2.358 ± 0.035
0.479HisMet: 0.479 ± 0.016
0.524HisAsn: 0.524 ± 0.019
1.526HisPro: 1.526 ± 0.03
0.663HisGln: 0.663 ± 0.02
1.675HisArg: 1.675 ± 0.033
1.041HisSer: 1.041 ± 0.026
0.939HisThr: 0.939 ± 0.025
1.616HisVal: 1.616 ± 0.028
0.332HisTrp: 0.332 ± 0.015
0.666HisTyr: 0.666 ± 0.018
0.0HisXaa: 0.0 ± 0.0
Ile
6.639IleAla: 6.639 ± 0.07
0.477IleCys: 0.477 ± 0.018
3.406IleAsp: 3.406 ± 0.044
3.434IleGlu: 3.434 ± 0.047
1.459IlePhe: 1.459 ± 0.026
4.529IleGly: 4.529 ± 0.055
1.006IleHis: 1.006 ± 0.025
1.711IleIle: 1.711 ± 0.036
1.351IleLys: 1.351 ± 0.028
4.025IleLeu: 4.025 ± 0.051
0.796IleMet: 0.796 ± 0.021
1.447IleAsn: 1.447 ± 0.034
2.342IlePro: 2.342 ± 0.042
1.261IleGln: 1.261 ± 0.03
3.263IleArg: 3.263 ± 0.045
2.531IleSer: 2.531 ± 0.04
2.407IleThr: 2.407 ± 0.042
4.016IleVal: 4.016 ± 0.053
0.439IleTrp: 0.439 ± 0.016
1.032IleTyr: 1.032 ± 0.027
0.0IleXaa: 0.0 ± 0.0
Lys
3.621LysAla: 3.621 ± 0.056
0.229LysCys: 0.229 ± 0.014
1.574LysAsp: 1.574 ± 0.038
1.662LysGlu: 1.662 ± 0.033
0.906LysPhe: 0.906 ± 0.025
2.39LysGly: 2.39 ± 0.041
0.664LysHis: 0.664 ± 0.017
1.569LysIle: 1.569 ± 0.033
1.177LysLys: 1.177 ± 0.033
3.457LysLeu: 3.457 ± 0.051
0.776LysMet: 0.776 ± 0.019
0.898LysAsn: 0.898 ± 0.025
1.907LysPro: 1.907 ± 0.041
1.092LysGln: 1.092 ± 0.027
2.238LysArg: 2.238 ± 0.035
1.679LysSer: 1.679 ± 0.03
1.757LysThr: 1.757 ± 0.037
2.537LysVal: 2.537 ± 0.044
0.359LysTrp: 0.359 ± 0.014
0.748LysTyr: 0.748 ± 0.021
0.0LysXaa: 0.0 ± 0.0
Leu
14.687LeuAla: 14.687 ± 0.131
1.058LeuCys: 1.058 ± 0.027
6.243LeuAsp: 6.243 ± 0.068
5.88LeuGlu: 5.88 ± 0.065
3.588LeuPhe: 3.588 ± 0.05
8.37LeuGly: 8.37 ± 0.074
2.252LeuHis: 2.252 ± 0.038
4.676LeuIle: 4.676 ± 0.061
3.415LeuLys: 3.415 ± 0.055
10.64LeuLeu: 10.64 ± 0.112
2.311LeuMet: 2.311 ± 0.037
2.655LeuAsn: 2.655 ± 0.04
6.009LeuPro: 6.009 ± 0.064
3.445LeuGln: 3.445 ± 0.045
7.836LeuArg: 7.836 ± 0.074
5.842LeuSer: 5.842 ± 0.062
5.413LeuThr: 5.413 ± 0.054
7.758LeuVal: 7.758 ± 0.09
1.17LeuTrp: 1.17 ± 0.03
2.125LeuTyr: 2.125 ± 0.036
0.0LeuXaa: 0.0 ± 0.0
Met
2.693MetAla: 2.693 ± 0.043
0.19MetCys: 0.19 ± 0.01
1.147MetAsp: 1.147 ± 0.023
1.197MetGlu: 1.197 ± 0.028
0.725MetPhe: 0.725 ± 0.022
1.715MetGly: 1.715 ± 0.034
0.549MetHis: 0.549 ± 0.016
1.116MetIle: 1.116 ± 0.023
1.035MetLys: 1.035 ± 0.027
2.653MetLeu: 2.653 ± 0.041
0.623MetMet: 0.623 ± 0.021
0.853MetAsn: 0.853 ± 0.018
1.412MetPro: 1.412 ± 0.03
0.968MetGln: 0.968 ± 0.025
1.78MetArg: 1.78 ± 0.033
1.583MetSer: 1.583 ± 0.028
1.463MetThr: 1.463 ± 0.032
1.557MetVal: 1.557 ± 0.033
0.212MetTrp: 0.212 ± 0.011
0.398MetTyr: 0.398 ± 0.014
0.0MetXaa: 0.0 ± 0.0
Asn
3.127AsnAla: 3.127 ± 0.045
0.325AsnCys: 0.325 ± 0.015
1.431AsnAsp: 1.431 ± 0.048
1.386AsnGlu: 1.386 ± 0.03
0.982AsnPhe: 0.982 ± 0.025
2.314AsnGly: 2.314 ± 0.063
0.549AsnHis: 0.549 ± 0.02
1.239AsnIle: 1.239 ± 0.027
0.72AsnLys: 0.72 ± 0.023
2.809AsnLeu: 2.809 ± 0.041
0.605AsnMet: 0.605 ± 0.02
0.728AsnAsn: 0.728 ± 0.029
1.826AsnPro: 1.826 ± 0.034
0.788AsnGln: 0.788 ± 0.024
1.994AsnArg: 1.994 ± 0.036
1.204AsnSer: 1.204 ± 0.03
1.317AsnThr: 1.317 ± 0.03
1.958AsnVal: 1.958 ± 0.035
0.41AsnTrp: 0.41 ± 0.016
0.669AsnTyr: 0.669 ± 0.019
0.0AsnXaa: 0.0 ± 0.0
Pro
6.46ProAla: 6.46 ± 0.076
0.402ProCys: 0.402 ± 0.015
3.335ProAsp: 3.335 ± 0.05
3.725ProGlu: 3.725 ± 0.05
1.87ProPhe: 1.87 ± 0.035
4.361ProGly: 4.361 ± 0.052
1.057ProHis: 1.057 ± 0.024
2.078ProIle: 2.078 ± 0.037
1.491ProLys: 1.491 ± 0.034
5.094ProLeu: 5.094 ± 0.061
1.134ProMet: 1.134 ± 0.022
1.289ProAsn: 1.289 ± 0.029
2.54ProPro: 2.54 ± 0.052
1.743ProGln: 1.743 ± 0.035
3.009ProArg: 3.009 ± 0.045
2.523ProSer: 2.523 ± 0.043
2.437ProThr: 2.437 ± 0.037
4.211ProVal: 4.211 ± 0.048
0.703ProTrp: 0.703 ± 0.025
1.124ProTyr: 1.124 ± 0.027
0.0ProXaa: 0.0 ± 0.0
Gln
4.225GlnAla: 4.225 ± 0.058
0.29GlnCys: 0.29 ± 0.013
1.429GlnAsp: 1.429 ± 0.026
1.598GlnGlu: 1.598 ± 0.034
1.183GlnPhe: 1.183 ± 0.03
2.439GlnGly: 2.439 ± 0.043
0.776GlnHis: 0.776 ± 0.02
1.727GlnIle: 1.727 ± 0.028
1.017GlnLys: 1.017 ± 0.026
3.72GlnLeu: 3.72 ± 0.048
0.88GlnMet: 0.88 ± 0.022
0.766GlnAsn: 0.766 ± 0.023
1.745GlnPro: 1.745 ± 0.033
1.471GlnGln: 1.471 ± 0.038
2.796GlnArg: 2.796 ± 0.047
1.741GlnSer: 1.741 ± 0.033
1.658GlnThr: 1.658 ± 0.034
2.554GlnVal: 2.554 ± 0.042
0.506GlnTrp: 0.506 ± 0.02
0.724GlnTyr: 0.724 ± 0.024
0.0GlnXaa: 0.0 ± 0.0
Arg
7.875ArgAla: 7.875 ± 0.083
0.698ArgCys: 0.698 ± 0.022
4.176ArgAsp: 4.176 ± 0.053
5.011ArgGlu: 5.011 ± 0.056
3.111ArgPhe: 3.111 ± 0.044
4.916ArgGly: 4.916 ± 0.06
2.0ArgHis: 2.0 ± 0.035
4.098ArgIle: 4.098 ± 0.05
2.29ArgLys: 2.29 ± 0.039
8.449ArgLeu: 8.449 ± 0.076
1.92ArgMet: 1.92 ± 0.034
2.053ArgAsn: 2.053 ± 0.036
3.45ArgPro: 3.45 ± 0.051
2.718ArgGln: 2.718 ± 0.047
5.87ArgArg: 5.87 ± 0.078
3.719ArgSer: 3.719 ± 0.049
3.279ArgThr: 3.279 ± 0.043
5.441ArgVal: 5.441 ± 0.063
1.101ArgTrp: 1.101 ± 0.028
1.977ArgTyr: 1.977 ± 0.034
0.0ArgXaa: 0.0 ± 0.0
Ser
6.212SerAla: 6.212 ± 0.074
0.528SerCys: 0.528 ± 0.018
2.821SerAsp: 2.821 ± 0.046
2.733SerGlu: 2.733 ± 0.038
2.111SerPhe: 2.111 ± 0.042
5.27SerGly: 5.27 ± 0.071
1.2SerHis: 1.2 ± 0.028
2.501SerIle: 2.501 ± 0.037
1.432SerLys: 1.432 ± 0.033
5.593SerLeu: 5.593 ± 0.065
1.271SerMet: 1.271 ± 0.026
1.332SerAsn: 1.332 ± 0.033
2.842SerPro: 2.842 ± 0.039
1.582SerGln: 1.582 ± 0.036
3.8SerArg: 3.8 ± 0.046
2.812SerSer: 2.812 ± 0.044
2.553SerThr: 2.553 ± 0.037
3.984SerVal: 3.984 ± 0.049
0.687SerTrp: 0.687 ± 0.02
1.251SerTyr: 1.251 ± 0.031
0.0SerXaa: 0.0 ± 0.0
Thr
5.669ThrAla: 5.669 ± 0.078
0.483ThrCys: 0.483 ± 0.021
2.548ThrAsp: 2.548 ± 0.046
2.747ThrGlu: 2.747 ± 0.053
1.711ThrPhe: 1.711 ± 0.036
4.77ThrGly: 4.77 ± 0.075
1.169ThrHis: 1.169 ± 0.028
2.367ThrIle: 2.367 ± 0.041
1.273ThrLys: 1.273 ± 0.033
5.859ThrLeu: 5.859 ± 0.063
1.091ThrMet: 1.091 ± 0.028
1.258ThrAsn: 1.258 ± 0.035
3.16ThrPro: 3.16 ± 0.046
1.528ThrGln: 1.528 ± 0.032
3.35ThrArg: 3.35 ± 0.043
2.522ThrSer: 2.522 ± 0.046
2.723ThrThr: 2.723 ± 0.049
4.23ThrVal: 4.23 ± 0.083
0.674ThrTrp: 0.674 ± 0.021
1.118ThrTyr: 1.118 ± 0.031
0.0ThrXaa: 0.0 ± 0.0
Val
9.672ValAla: 9.672 ± 0.076
0.812ValCys: 0.812 ± 0.023
4.137ValAsp: 4.137 ± 0.045
4.724ValGlu: 4.724 ± 0.061
2.838ValPhe: 2.838 ± 0.046
5.94ValGly: 5.94 ± 0.057
1.479ValHis: 1.479 ± 0.033
3.781ValIle: 3.781 ± 0.051
2.371ValLys: 2.371 ± 0.045
7.959ValLeu: 7.959 ± 0.08
1.924ValMet: 1.924 ± 0.038
1.902ValAsn: 1.902 ± 0.032
3.823ValPro: 3.823 ± 0.047
2.301ValGln: 2.301 ± 0.042
5.497ValArg: 5.497 ± 0.059
4.458ValSer: 4.458 ± 0.055
4.212ValThr: 4.212 ± 0.08
6.516ValVal: 6.516 ± 0.077
0.956ValTrp: 0.956 ± 0.026
1.449ValTyr: 1.449 ± 0.03
0.0ValXaa: 0.0 ± 0.0
Trp
1.183TrpAla: 1.183 ± 0.031
0.168TrpCys: 0.168 ± 0.009
0.634TrpAsp: 0.634 ± 0.021
0.651TrpGlu: 0.651 ± 0.019
0.512TrpPhe: 0.512 ± 0.019
0.945TrpGly: 0.945 ± 0.025
0.372TrpHis: 0.372 ± 0.015
0.655TrpIle: 0.655 ± 0.019
0.469TrpLys: 0.469 ± 0.019
1.855TrpLeu: 1.855 ± 0.045
0.379TrpMet: 0.379 ± 0.013
0.445TrpAsn: 0.445 ± 0.015
0.605TrpPro: 0.605 ± 0.022
0.629TrpGln: 0.629 ± 0.02
1.154TrpArg: 1.154 ± 0.03
0.778TrpSer: 0.778 ± 0.024
0.647TrpThr: 0.647 ± 0.021
0.936TrpVal: 0.936 ± 0.023
0.206TrpTrp: 0.206 ± 0.012
0.281TrpTyr: 0.281 ± 0.014
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.472TyrAla: 2.472 ± 0.037
0.297TyrCys: 0.297 ± 0.014
1.339TyrAsp: 1.339 ± 0.034
1.155TyrGlu: 1.155 ± 0.028
0.995TyrPhe: 0.995 ± 0.03
2.039TyrGly: 2.039 ± 0.036
0.528TyrHis: 0.528 ± 0.019
0.852TyrIle: 0.852 ± 0.022
0.616TyrLys: 0.616 ± 0.021
2.478TyrLeu: 2.478 ± 0.039
0.422TyrMet: 0.422 ± 0.017
0.614TyrAsn: 0.614 ± 0.021
1.143TyrPro: 1.143 ± 0.027
0.796TyrGln: 0.796 ± 0.021
2.025TyrArg: 2.025 ± 0.04
1.181TyrSer: 1.181 ± 0.026
1.14TyrThr: 1.14 ± 0.035
1.713TyrVal: 1.713 ± 0.037
0.346TyrTrp: 0.346 ± 0.016
0.636TyrTyr: 0.636 ± 0.02
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 5176 proteins (1764397 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