Amino acid dipepetide frequency for Piromyces sp. (strain E2)

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
2.361AlaAla: 2.361 ± 0.042
0.843AlaCys: 0.843 ± 0.018
2.003AlaAsp: 2.003 ± 0.028
2.251AlaGlu: 2.251 ± 0.031
1.71AlaPhe: 1.71 ± 0.024
1.935AlaGly: 1.935 ± 0.033
0.597AlaHis: 0.597 ± 0.012
3.273AlaIle: 3.273 ± 0.032
3.078AlaLys: 3.078 ± 0.029
3.531AlaLeu: 3.531 ± 0.037
0.841AlaMet: 0.841 ± 0.024
2.818AlaAsn: 2.818 ± 0.031
1.353AlaPro: 1.353 ± 0.027
1.216AlaGln: 1.216 ± 0.022
1.192AlaArg: 1.192 ± 0.02
3.038AlaSer: 3.038 ± 0.036
2.398AlaThr: 2.398 ± 0.031
2.243AlaVal: 2.243 ± 0.026
0.287AlaTrp: 0.287 ± 0.009
1.58AlaTyr: 1.58 ± 0.021
0.0AlaXaa: 0.0 ± 0.0
Cys
0.629CysAla: 0.629 ± 0.015
0.569CysCys: 0.569 ± 0.017
0.907CysAsp: 0.907 ± 0.017
0.975CysGlu: 0.975 ± 0.018
0.642CysPhe: 0.642 ± 0.011
1.166CysGly: 1.166 ± 0.029
0.328CysHis: 0.328 ± 0.009
1.315CysIle: 1.315 ± 0.017
1.353CysLys: 1.353 ± 0.024
1.181CysLeu: 1.181 ± 0.018
0.279CysMet: 0.279 ± 0.007
1.184CysAsn: 1.184 ± 0.017
0.62CysPro: 0.62 ± 0.014
0.671CysGln: 0.671 ± 0.018
0.529CysArg: 0.529 ± 0.011
1.515CysSer: 1.515 ± 0.025
0.984CysThr: 0.984 ± 0.028
0.815CysVal: 0.815 ± 0.016
0.172CysTrp: 0.172 ± 0.007
0.743CysTyr: 0.743 ± 0.014
0.0CysXaa: 0.0 ± 0.0
Asp
2.123AspAla: 2.123 ± 0.029
0.868AspCys: 0.868 ± 0.017
5.149AspAsp: 5.149 ± 0.092
4.95AspGlu: 4.95 ± 0.046
2.552AspPhe: 2.552 ± 0.024
2.928AspGly: 2.928 ± 0.034
0.995AspHis: 0.995 ± 0.014
5.782AspIle: 5.782 ± 0.043
4.691AspLys: 4.691 ± 0.036
4.307AspLeu: 4.307 ± 0.04
1.096AspMet: 1.096 ± 0.013
5.962AspAsn: 5.962 ± 0.072
1.782AspPro: 1.782 ± 0.022
1.483AspGln: 1.483 ± 0.017
1.64AspArg: 1.64 ± 0.028
4.615AspSer: 4.615 ± 0.036
2.965AspThr: 2.965 ± 0.029
2.966AspVal: 2.966 ± 0.028
0.503AspTrp: 0.503 ± 0.01
2.976AspTyr: 2.976 ± 0.028
0.0AspXaa: 0.0 ± 0.0
Glu
2.601GluAla: 2.601 ± 0.032
1.048GluCys: 1.048 ± 0.019
4.426GluAsp: 4.426 ± 0.04
7.592GluGlu: 7.592 ± 0.096
2.712GluPhe: 2.712 ± 0.025
2.616GluGly: 2.616 ± 0.029
1.017GluHis: 1.017 ± 0.017
6.145GluIle: 6.145 ± 0.056
7.585GluLys: 7.585 ± 0.059
5.345GluLeu: 5.345 ± 0.04
1.564GluMet: 1.564 ± 0.028
7.541GluAsn: 7.541 ± 0.067
1.823GluPro: 1.823 ± 0.039
2.149GluGln: 2.149 ± 0.028
2.3GluArg: 2.3 ± 0.032
4.537GluSer: 4.537 ± 0.037
3.421GluThr: 3.421 ± 0.038
3.251GluVal: 3.251 ± 0.034
0.617GluTrp: 0.617 ± 0.014
3.199GluTyr: 3.199 ± 0.028
0.0GluXaa: 0.0 ± 0.0
Phe
1.5PheAla: 1.5 ± 0.02
0.643PheCys: 0.643 ± 0.013
2.761PheAsp: 2.761 ± 0.025
2.66PheGlu: 2.66 ± 0.027
1.832PhePhe: 1.832 ± 0.022
2.215PheGly: 2.215 ± 0.029
0.708PheHis: 0.708 ± 0.012
3.742PheIle: 3.742 ± 0.036
3.265PheLys: 3.265 ± 0.028
3.28PheLeu: 3.28 ± 0.032
0.829PheMet: 0.829 ± 0.013
3.744PheAsn: 3.744 ± 0.034
1.343PhePro: 1.343 ± 0.015
1.206PheGln: 1.206 ± 0.016
1.197PheArg: 1.197 ± 0.025
3.498PheSer: 3.498 ± 0.031
2.174PheThr: 2.174 ± 0.02
2.067PheVal: 2.067 ± 0.023
0.335PheTrp: 0.335 ± 0.008
1.983PheTyr: 1.983 ± 0.024
0.0PheXaa: 0.0 ± 0.0
Gly
2.048GlyAla: 2.048 ± 0.03
0.884GlyCys: 0.884 ± 0.022
2.532GlyAsp: 2.532 ± 0.031
2.726GlyGlu: 2.726 ± 0.03
1.948GlyPhe: 1.948 ± 0.023
2.805GlyGly: 2.805 ± 0.051
0.882GlyHis: 0.882 ± 0.016
3.687GlyIle: 3.687 ± 0.034
3.987GlyLys: 3.987 ± 0.033
3.064GlyLeu: 3.064 ± 0.032
1.014GlyMet: 1.014 ± 0.028
4.004GlyAsn: 4.004 ± 0.038
1.126GlyPro: 1.126 ± 0.023
1.381GlyGln: 1.381 ± 0.023
1.568GlyArg: 1.568 ± 0.021
3.577GlySer: 3.577 ± 0.04
2.411GlyThr: 2.411 ± 0.03
2.42GlyVal: 2.42 ± 0.03
0.504GlyTrp: 0.504 ± 0.013
2.545GlyTyr: 2.545 ± 0.035
0.0GlyXaa: 0.0 ± 0.0
His
0.594HisAla: 0.594 ± 0.011
0.394HisCys: 0.394 ± 0.009
0.911HisAsp: 0.911 ± 0.014
0.992HisGlu: 0.992 ± 0.015
0.793HisPhe: 0.793 ± 0.013
0.911HisGly: 0.911 ± 0.017
0.64HisHis: 0.64 ± 0.019
1.322HisIle: 1.322 ± 0.019
1.146HisLys: 1.146 ± 0.014
1.432HisLeu: 1.432 ± 0.018
0.294HisMet: 0.294 ± 0.006
1.321HisAsn: 1.321 ± 0.019
0.777HisPro: 0.777 ± 0.014
0.655HisGln: 0.655 ± 0.011
0.62HisArg: 0.62 ± 0.013
1.562HisSer: 1.562 ± 0.023
0.8HisThr: 0.8 ± 0.013
0.703HisVal: 0.703 ± 0.014
0.185HisTrp: 0.185 ± 0.006
0.907HisTyr: 0.907 ± 0.011
0.0HisXaa: 0.0 ± 0.0
Ile
2.967IleAla: 2.967 ± 0.033
1.309IleCys: 1.309 ± 0.02
5.326IleAsp: 5.326 ± 0.04
5.889IleGlu: 5.889 ± 0.043
3.575IlePhe: 3.575 ± 0.037
3.285IleGly: 3.285 ± 0.037
1.516IleHis: 1.516 ± 0.018
7.434IleIle: 7.434 ± 0.064
7.516IleLys: 7.516 ± 0.047
6.62IleLeu: 6.62 ± 0.053
1.543IleMet: 1.543 ± 0.018
8.603IleAsn: 8.603 ± 0.08
3.592IlePro: 3.592 ± 0.033
2.706IleGln: 2.706 ± 0.027
2.462IleArg: 2.462 ± 0.023
6.633IleSer: 6.633 ± 0.049
4.557IleThr: 4.557 ± 0.03
3.997IleVal: 3.997 ± 0.039
0.547IleTrp: 0.547 ± 0.011
3.719IleTyr: 3.719 ± 0.035
0.0IleXaa: 0.0 ± 0.0
Lys
3.212LysAla: 3.212 ± 0.031
1.544LysCys: 1.544 ± 0.026
5.162LysAsp: 5.162 ± 0.039
7.719LysGlu: 7.719 ± 0.076
3.164LysPhe: 3.164 ± 0.031
3.246LysGly: 3.246 ± 0.037
1.348LysHis: 1.348 ± 0.015
6.931LysIle: 6.931 ± 0.049
9.172LysLys: 9.172 ± 0.073
6.629LysLeu: 6.629 ± 0.049
1.777LysMet: 1.777 ± 0.019
8.758LysAsn: 8.758 ± 0.08
2.619LysPro: 2.619 ± 0.037
2.63LysGln: 2.63 ± 0.027
3.257LysArg: 3.257 ± 0.027
6.541LysSer: 6.541 ± 0.048
4.575LysThr: 4.575 ± 0.038
3.865LysVal: 3.865 ± 0.034
0.67LysTrp: 0.67 ± 0.012
4.504LysTyr: 4.504 ± 0.041
0.0LysXaa: 0.0 ± 0.0
Leu
3.094LeuAla: 3.094 ± 0.039
1.264LeuCys: 1.264 ± 0.018
4.062LeuAsp: 4.062 ± 0.028
4.934LeuGlu: 4.934 ± 0.038
3.662LeuPhe: 3.662 ± 0.036
3.036LeuGly: 3.036 ± 0.03
1.256LeuHis: 1.256 ± 0.018
6.573LeuIle: 6.573 ± 0.05
7.098LeuLys: 7.098 ± 0.044
7.337LeuLeu: 7.337 ± 0.079
1.707LeuMet: 1.707 ± 0.023
6.894LeuAsn: 6.894 ± 0.05
3.1LeuPro: 3.1 ± 0.032
2.441LeuGln: 2.441 ± 0.025
2.545LeuArg: 2.545 ± 0.025
6.728LeuSer: 6.728 ± 0.045
4.087LeuThr: 4.087 ± 0.037
3.583LeuVal: 3.583 ± 0.028
0.605LeuTrp: 0.605 ± 0.013
3.532LeuTyr: 3.532 ± 0.033
0.0LeuXaa: 0.0 ± 0.0
Met
0.974MetAla: 0.974 ± 0.016
0.224MetCys: 0.224 ± 0.007
1.389MetAsp: 1.389 ± 0.019
1.576MetGlu: 1.576 ± 0.02
0.761MetPhe: 0.761 ± 0.023
0.908MetGly: 0.908 ± 0.017
0.254MetHis: 0.254 ± 0.007
1.498MetIle: 1.498 ± 0.02
2.029MetLys: 2.029 ± 0.023
1.287MetLeu: 1.287 ± 0.017
0.504MetMet: 0.504 ± 0.012
2.297MetAsn: 2.297 ± 0.048
0.679MetPro: 0.679 ± 0.019
0.494MetGln: 0.494 ± 0.014
0.55MetArg: 0.55 ± 0.011
1.446MetSer: 1.446 ± 0.016
1.047MetThr: 1.047 ± 0.016
1.14MetVal: 1.14 ± 0.016
0.126MetTrp: 0.126 ± 0.005
0.814MetTyr: 0.814 ± 0.012
0.0MetXaa: 0.0 ± 0.0
Asn
3.075AsnAla: 3.075 ± 0.038
1.198AsnCys: 1.198 ± 0.018
6.605AsnAsp: 6.605 ± 0.091
7.202AsnGlu: 7.202 ± 0.069
3.21AsnPhe: 3.21 ± 0.028
4.586AsnGly: 4.586 ± 0.043
1.554AsnHis: 1.554 ± 0.02
8.705AsnIle: 8.705 ± 0.08
8.523AsnLys: 8.523 ± 0.09
5.987AsnLeu: 5.987 ± 0.047
1.915AsnMet: 1.915 ± 0.039
16.485AsnAsn: 16.485 ± 0.259
2.863AsnPro: 2.863 ± 0.033
2.995AsnGln: 2.995 ± 0.041
2.463AsnArg: 2.463 ± 0.025
8.483AsnSer: 8.483 ± 0.074
5.309AsnThr: 5.309 ± 0.045
4.206AsnVal: 4.206 ± 0.033
0.581AsnTrp: 0.581 ± 0.015
4.34AsnTyr: 4.34 ± 0.04
0.0AsnXaa: 0.0 ± 0.0
Pro
1.336ProAla: 1.336 ± 0.025
0.444ProCys: 0.444 ± 0.009
1.735ProAsp: 1.735 ± 0.021
2.632ProGlu: 2.632 ± 0.034
1.499ProPhe: 1.499 ± 0.018
1.424ProGly: 1.424 ± 0.022
0.518ProHis: 0.518 ± 0.01
2.808ProIle: 2.808 ± 0.024
2.799ProLys: 2.799 ± 0.031
3.21ProLeu: 3.21 ± 0.036
0.685ProMet: 0.685 ± 0.017
2.702ProAsn: 2.702 ± 0.03
2.065ProPro: 2.065 ± 0.067
1.305ProGln: 1.305 ± 0.029
0.916ProArg: 0.916 ± 0.018
3.254ProSer: 3.254 ± 0.04
2.466ProThr: 2.466 ± 0.04
2.136ProVal: 2.136 ± 0.035
0.233ProTrp: 0.233 ± 0.007
1.536ProTyr: 1.536 ± 0.024
0.0ProXaa: 0.0 ± 0.0
Gln
1.188GlnAla: 1.188 ± 0.019
0.617GlnCys: 0.617 ± 0.015
1.507GlnAsp: 1.507 ± 0.018
2.138GlnGlu: 2.138 ± 0.026
1.295GlnPhe: 1.295 ± 0.017
1.245GlnGly: 1.245 ± 0.022
0.555GlnHis: 0.555 ± 0.01
2.257GlnIle: 2.257 ± 0.021
2.754GlnLys: 2.754 ± 0.026
2.716GlnLeu: 2.716 ± 0.031
0.716GlnMet: 0.716 ± 0.016
3.0GlnAsn: 3.0 ± 0.036
1.373GlnPro: 1.373 ± 0.034
2.088GlnGln: 2.088 ± 0.076
1.125GlnArg: 1.125 ± 0.017
2.422GlnSer: 2.422 ± 0.024
1.548GlnThr: 1.548 ± 0.021
1.324GlnVal: 1.324 ± 0.018
0.36GlnTrp: 0.36 ± 0.009
1.689GlnTyr: 1.689 ± 0.022
0.0GlnXaa: 0.0 ± 0.0
Arg
1.164ArgAla: 1.164 ± 0.019
0.575ArgCys: 0.575 ± 0.012
1.747ArgAsp: 1.747 ± 0.033
2.092ArgGlu: 2.092 ± 0.027
1.286ArgPhe: 1.286 ± 0.017
1.318ArgGly: 1.318 ± 0.018
0.656ArgHis: 0.656 ± 0.013
2.519ArgIle: 2.519 ± 0.027
3.13ArgLys: 3.13 ± 0.025
2.328ArgLeu: 2.328 ± 0.026
0.686ArgMet: 0.686 ± 0.012
2.881ArgAsn: 2.881 ± 0.04
0.996ArgPro: 0.996 ± 0.015
0.997ArgGln: 0.997 ± 0.014
1.641ArgArg: 1.641 ± 0.026
2.35ArgSer: 2.35 ± 0.034
1.475ArgThr: 1.475 ± 0.017
1.471ArgVal: 1.471 ± 0.019
0.275ArgTrp: 0.275 ± 0.007
1.485ArgTyr: 1.485 ± 0.019
0.0ArgXaa: 0.0 ± 0.0
Ser
2.818SerAla: 2.818 ± 0.033
1.162SerCys: 1.162 ± 0.018
4.552SerAsp: 4.552 ± 0.037
4.805SerGlu: 4.805 ± 0.036
3.642SerPhe: 3.642 ± 0.032
3.741SerGly: 3.741 ± 0.043
1.419SerHis: 1.419 ± 0.02
6.718SerIle: 6.718 ± 0.045
6.717SerLys: 6.717 ± 0.048
6.674SerLeu: 6.674 ± 0.044
1.517SerMet: 1.517 ± 0.019
8.33SerAsn: 8.33 ± 0.073
3.099SerPro: 3.099 ± 0.044
2.67SerGln: 2.67 ± 0.033
2.452SerArg: 2.452 ± 0.032
9.677SerSer: 9.677 ± 0.114
5.109SerThr: 5.109 ± 0.053
3.911SerVal: 3.911 ± 0.034
0.542SerTrp: 0.542 ± 0.012
3.371SerTyr: 3.371 ± 0.025
0.0SerXaa: 0.0 ± 0.0
Thr
2.382ThrAla: 2.382 ± 0.032
0.873ThrCys: 0.873 ± 0.019
2.892ThrAsp: 2.892 ± 0.029
3.59ThrGlu: 3.59 ± 0.035
2.29ThrPhe: 2.29 ± 0.023
2.515ThrGly: 2.515 ± 0.033
0.851ThrHis: 0.851 ± 0.014
4.706ThrIle: 4.706 ± 0.041
4.366ThrLys: 4.366 ± 0.038
4.367ThrLeu: 4.367 ± 0.032
0.93ThrMet: 0.93 ± 0.014
4.686ThrAsn: 4.686 ± 0.046
2.701ThrPro: 2.701 ± 0.043
1.527ThrGln: 1.527 ± 0.021
1.453ThrArg: 1.453 ± 0.02
5.038ThrSer: 5.038 ± 0.05
6.114ThrThr: 6.114 ± 0.21
3.006ThrVal: 3.006 ± 0.031
0.393ThrTrp: 0.393 ± 0.009
2.135ThrTyr: 2.135 ± 0.024
0.0ThrXaa: 0.0 ± 0.0
Val
2.14ValAla: 2.14 ± 0.028
0.833ValCys: 0.833 ± 0.016
3.182ValAsp: 3.182 ± 0.034
3.537ValGlu: 3.537 ± 0.039
2.033ValPhe: 2.033 ± 0.022
2.198ValGly: 2.198 ± 0.028
0.792ValHis: 0.792 ± 0.014
3.942ValIle: 3.942 ± 0.032
4.161ValLys: 4.161 ± 0.03
3.791ValLeu: 3.791 ± 0.031
0.981ValMet: 0.981 ± 0.013
4.302ValAsn: 4.302 ± 0.035
1.865ValPro: 1.865 ± 0.025
1.515ValGln: 1.515 ± 0.024
1.441ValArg: 1.441 ± 0.019
3.638ValSer: 3.638 ± 0.03
2.772ValThr: 2.772 ± 0.029
2.951ValVal: 2.951 ± 0.037
0.342ValTrp: 0.342 ± 0.009
2.102ValTyr: 2.102 ± 0.023
0.0ValXaa: 0.0 ± 0.0
Trp
0.392TrpAla: 0.392 ± 0.009
0.295TrpCys: 0.295 ± 0.011
0.517TrpAsp: 0.517 ± 0.011
0.479TrpGlu: 0.479 ± 0.011
0.299TrpPhe: 0.299 ± 0.009
0.489TrpGly: 0.489 ± 0.014
0.12TrpHis: 0.12 ± 0.005
0.596TrpIle: 0.596 ± 0.012
0.674TrpLys: 0.674 ± 0.014
0.589TrpLeu: 0.589 ± 0.011
0.199TrpMet: 0.199 ± 0.007
0.69TrpAsn: 0.69 ± 0.015
0.177TrpPro: 0.177 ± 0.005
0.172TrpGln: 0.172 ± 0.007
0.26TrpArg: 0.26 ± 0.007
0.552TrpSer: 0.552 ± 0.013
0.368TrpThr: 0.368 ± 0.008
0.394TrpVal: 0.394 ± 0.01
0.1TrpTrp: 0.1 ± 0.004
0.374TrpTyr: 0.374 ± 0.01
0.0TrpXaa: 0.0 ± 0.0
Tyr
1.949TyrAla: 1.949 ± 0.037
0.99TyrCys: 0.99 ± 0.022
2.965TyrAsp: 2.965 ± 0.029
2.753TyrGlu: 2.753 ± 0.028
2.078TyrPhe: 2.078 ± 0.023
2.545TyrGly: 2.545 ± 0.028
0.957TyrHis: 0.957 ± 0.017
3.842TyrIle: 3.842 ± 0.035
3.278TyrLys: 3.278 ± 0.03
3.861TyrLeu: 3.861 ± 0.032
0.92TyrMet: 0.92 ± 0.012
4.084TyrAsn: 4.084 ± 0.035
1.75TyrPro: 1.75 ± 0.026
1.618TyrGln: 1.618 ± 0.021
1.461TyrArg: 1.461 ± 0.019
3.821TyrSer: 3.821 ± 0.034
2.234TyrThr: 2.234 ± 0.023
2.07TyrVal: 2.07 ± 0.025
0.359TyrTrp: 0.359 ± 0.01
2.842TyrTyr: 2.842 ± 0.036
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 14606 proteins (5645737 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