Amino acid dipepetide frequency for Polaromonas sp. A23

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
16.402AlaAla: 16.402 ± 0.164
1.281AlaCys: 1.281 ± 0.034
5.897AlaAsp: 5.897 ± 0.074
6.113AlaGlu: 6.113 ± 0.077
4.123AlaPhe: 4.123 ± 0.057
10.772AlaGly: 10.772 ± 0.125
2.534AlaHis: 2.534 ± 0.04
5.195AlaIle: 5.195 ± 0.065
4.35AlaLys: 4.35 ± 0.07
14.397AlaLeu: 14.397 ± 0.14
3.694AlaMet: 3.694 ± 0.058
2.944AlaAsn: 2.944 ± 0.061
5.555AlaPro: 5.555 ± 0.091
5.629AlaGln: 5.629 ± 0.07
7.704AlaArg: 7.704 ± 0.097
7.056AlaSer: 7.056 ± 0.079
6.001AlaThr: 6.001 ± 0.075
9.091AlaVal: 9.091 ± 0.095
1.875AlaTrp: 1.875 ± 0.04
2.577AlaTyr: 2.577 ± 0.056
0.0AlaXaa: 0.0 ± 0.0
Cys
1.09CysAla: 1.09 ± 0.029
0.118CysCys: 0.118 ± 0.01
0.523CysAsp: 0.523 ± 0.021
0.538CysGlu: 0.538 ± 0.023
0.351CysPhe: 0.351 ± 0.016
0.984CysGly: 0.984 ± 0.032
0.275CysHis: 0.275 ± 0.013
0.463CysIle: 0.463 ± 0.017
0.278CysLys: 0.278 ± 0.014
0.873CysLeu: 0.873 ± 0.025
0.235CysMet: 0.235 ± 0.014
0.241CysAsn: 0.241 ± 0.014
0.485CysPro: 0.485 ± 0.022
0.259CysGln: 0.259 ± 0.015
0.552CysArg: 0.552 ± 0.021
0.572CysSer: 0.572 ± 0.021
0.492CysThr: 0.492 ± 0.019
0.749CysVal: 0.749 ± 0.024
0.119CysTrp: 0.119 ± 0.01
0.221CysTyr: 0.221 ± 0.012
0.0CysXaa: 0.0 ± 0.0
Asp
6.331AspAla: 6.331 ± 0.081
0.478AspCys: 0.478 ± 0.018
2.364AspAsp: 2.364 ± 0.047
2.929AspGlu: 2.929 ± 0.049
2.077AspPhe: 2.077 ± 0.042
4.192AspGly: 4.192 ± 0.068
1.031AspHis: 1.031 ± 0.03
2.567AspIle: 2.567 ± 0.043
1.979AspLys: 1.979 ± 0.041
5.005AspLeu: 5.005 ± 0.069
1.304AspMet: 1.304 ± 0.031
1.256AspAsn: 1.256 ± 0.025
2.606AspPro: 2.606 ± 0.048
1.535AspGln: 1.535 ± 0.038
2.895AspArg: 2.895 ± 0.046
2.395AspSer: 2.395 ± 0.048
2.413AspThr: 2.413 ± 0.052
3.956AspVal: 3.956 ± 0.057
0.849AspTrp: 0.849 ± 0.028
1.371AspTyr: 1.371 ± 0.031
0.0AspXaa: 0.0 ± 0.0
Glu
6.551GluAla: 6.551 ± 0.081
0.396GluCys: 0.396 ± 0.017
2.154GluAsp: 2.154 ± 0.042
2.651GluGlu: 2.651 ± 0.048
1.976GluPhe: 1.976 ± 0.04
3.632GluGly: 3.632 ± 0.054
1.237GluHis: 1.237 ± 0.034
2.778GluIle: 2.778 ± 0.051
2.419GluLys: 2.419 ± 0.046
5.922GluLeu: 5.922 ± 0.081
1.341GluMet: 1.341 ± 0.031
1.442GluAsn: 1.442 ± 0.032
2.334GluPro: 2.334 ± 0.041
2.471GluGln: 2.471 ± 0.047
3.999GluArg: 3.999 ± 0.062
2.652GluSer: 2.652 ± 0.044
2.608GluThr: 2.608 ± 0.045
3.93GluVal: 3.93 ± 0.055
0.707GluTrp: 0.707 ± 0.023
1.047GluTyr: 1.047 ± 0.029
0.0GluXaa: 0.0 ± 0.0
Phe
4.264PheAla: 4.264 ± 0.065
0.441PheCys: 0.441 ± 0.017
2.473PheAsp: 2.473 ± 0.049
2.168PheGlu: 2.168 ± 0.038
1.566PhePhe: 1.566 ± 0.037
3.488PheGly: 3.488 ± 0.052
0.744PheHis: 0.744 ± 0.023
1.621PheIle: 1.621 ± 0.039
1.416PheLys: 1.416 ± 0.037
3.151PheLeu: 3.151 ± 0.059
0.904PheMet: 0.904 ± 0.027
1.255PheAsn: 1.255 ± 0.026
1.591PhePro: 1.591 ± 0.039
1.054PheGln: 1.054 ± 0.031
1.928PheArg: 1.928 ± 0.038
2.505PheSer: 2.505 ± 0.042
2.035PheThr: 2.035 ± 0.042
2.905PheVal: 2.905 ± 0.046
0.574PheTrp: 0.574 ± 0.019
0.915PheTyr: 0.915 ± 0.027
0.0PheXaa: 0.0 ± 0.0
Gly
8.97GlyAla: 8.97 ± 0.108
0.856GlyCys: 0.856 ± 0.027
3.774GlyAsp: 3.774 ± 0.056
4.247GlyGlu: 4.247 ± 0.051
3.389GlyPhe: 3.389 ± 0.05
6.827GlyGly: 6.827 ± 0.126
1.843GlyHis: 1.843 ± 0.041
4.145GlyIle: 4.145 ± 0.052
3.968GlyLys: 3.968 ± 0.063
8.933GlyLeu: 8.933 ± 0.086
2.44GlyMet: 2.44 ± 0.044
2.487GlyAsn: 2.487 ± 0.079
2.967GlyPro: 2.967 ± 0.047
3.402GlyGln: 3.402 ± 0.056
4.95GlyArg: 4.95 ± 0.07
4.885GlySer: 4.885 ± 0.07
4.498GlyThr: 4.498 ± 0.097
6.567GlyVal: 6.567 ± 0.08
1.436GlyTrp: 1.436 ± 0.038
2.331GlyTyr: 2.331 ± 0.046
0.0GlyXaa: 0.0 ± 0.0
His
2.67HisAla: 2.67 ± 0.05
0.28HisCys: 0.28 ± 0.015
1.071HisAsp: 1.071 ± 0.031
1.186HisGlu: 1.186 ± 0.031
0.89HisPhe: 0.89 ± 0.023
2.034HisGly: 2.034 ± 0.047
0.619HisHis: 0.619 ± 0.024
1.026HisIle: 1.026 ± 0.028
0.671HisLys: 0.671 ± 0.024
2.192HisLeu: 2.192 ± 0.04
0.512HisMet: 0.512 ± 0.019
0.54HisAsn: 0.54 ± 0.022
1.427HisPro: 1.427 ± 0.035
0.736HisGln: 0.736 ± 0.027
1.323HisArg: 1.323 ± 0.032
1.084HisSer: 1.084 ± 0.029
1.085HisThr: 1.085 ± 0.029
1.584HisVal: 1.584 ± 0.033
0.376HisTrp: 0.376 ± 0.017
0.65HisTyr: 0.65 ± 0.023
0.0HisXaa: 0.0 ± 0.0
Ile
6.17IleAla: 6.17 ± 0.069
0.486IleCys: 0.486 ± 0.018
2.858IleAsp: 2.858 ± 0.048
3.034IleGlu: 3.034 ± 0.054
1.515IlePhe: 1.515 ± 0.035
3.966IleGly: 3.966 ± 0.066
0.925IleHis: 0.925 ± 0.027
1.714IleIle: 1.714 ± 0.041
1.894IleLys: 1.894 ± 0.045
3.497IleLeu: 3.497 ± 0.049
0.867IleMet: 0.867 ± 0.03
1.592IleAsn: 1.592 ± 0.034
2.165IlePro: 2.165 ± 0.044
1.383IleGln: 1.383 ± 0.032
2.632IleArg: 2.632 ± 0.042
2.77IleSer: 2.77 ± 0.054
2.676IleThr: 2.676 ± 0.057
3.469IleVal: 3.469 ± 0.051
0.518IleTrp: 0.518 ± 0.021
1.056IleTyr: 1.056 ± 0.028
0.0IleXaa: 0.0 ± 0.0
Lys
4.741LysAla: 4.741 ± 0.076
0.188LysCys: 0.188 ± 0.012
1.869LysAsp: 1.869 ± 0.04
1.858LysGlu: 1.858 ± 0.044
1.202LysPhe: 1.202 ± 0.028
2.832LysGly: 2.832 ± 0.055
0.788LysHis: 0.788 ± 0.025
1.84LysIle: 1.84 ± 0.045
1.912LysLys: 1.912 ± 0.054
4.144LysLeu: 4.144 ± 0.072
1.037LysMet: 1.037 ± 0.029
1.295LysAsn: 1.295 ± 0.034
2.435LysPro: 2.435 ± 0.041
1.38LysGln: 1.38 ± 0.035
2.396LysArg: 2.396 ± 0.044
2.128LysSer: 2.128 ± 0.045
2.469LysThr: 2.469 ± 0.047
2.904LysVal: 2.904 ± 0.053
0.422LysTrp: 0.422 ± 0.017
0.802LysTyr: 0.802 ± 0.025
0.0LysXaa: 0.0 ± 0.0
Leu
14.231LeuAla: 14.231 ± 0.139
1.029LeuCys: 1.029 ± 0.03
5.496LeuAsp: 5.496 ± 0.063
5.244LeuGlu: 5.244 ± 0.071
3.619LeuPhe: 3.619 ± 0.058
8.683LeuGly: 8.683 ± 0.098
2.292LeuHis: 2.292 ± 0.048
4.585LeuIle: 4.585 ± 0.061
4.358LeuLys: 4.358 ± 0.052
11.525LeuLeu: 11.525 ± 0.149
2.747LeuMet: 2.747 ± 0.045
2.901LeuAsn: 2.901 ± 0.047
6.03LeuPro: 6.03 ± 0.07
4.456LeuGln: 4.456 ± 0.066
6.864LeuArg: 6.864 ± 0.091
6.348LeuSer: 6.348 ± 0.083
5.486LeuThr: 5.486 ± 0.067
7.936LeuVal: 7.936 ± 0.094
1.369LeuTrp: 1.369 ± 0.036
2.065LeuTyr: 2.065 ± 0.043
0.0LeuXaa: 0.0 ± 0.0
Met
3.298MetAla: 3.298 ± 0.051
0.202MetCys: 0.202 ± 0.013
1.226MetAsp: 1.226 ± 0.031
1.18MetGlu: 1.18 ± 0.027
0.775MetPhe: 0.775 ± 0.024
2.069MetGly: 2.069 ± 0.04
0.554MetHis: 0.554 ± 0.018
1.031MetIle: 1.031 ± 0.027
1.253MetLys: 1.253 ± 0.031
2.812MetLeu: 2.812 ± 0.047
0.642MetMet: 0.642 ± 0.023
0.954MetAsn: 0.954 ± 0.025
1.501MetPro: 1.501 ± 0.034
1.211MetGln: 1.211 ± 0.028
1.655MetArg: 1.655 ± 0.031
1.649MetSer: 1.649 ± 0.034
1.614MetThr: 1.614 ± 0.032
1.969MetVal: 1.969 ± 0.047
0.233MetTrp: 0.233 ± 0.014
0.428MetTyr: 0.428 ± 0.02
0.0MetXaa: 0.0 ± 0.0
Asn
3.342AsnAla: 3.342 ± 0.056
0.303AsnCys: 0.303 ± 0.016
1.312AsnAsp: 1.312 ± 0.028
1.314AsnGlu: 1.314 ± 0.03
1.066AsnPhe: 1.066 ± 0.027
2.398AsnGly: 2.398 ± 0.076
0.598AsnHis: 0.598 ± 0.022
1.418AsnIle: 1.418 ± 0.039
1.02AsnLys: 1.02 ± 0.034
2.813AsnLeu: 2.813 ± 0.046
0.645AsnMet: 0.645 ± 0.024
0.87AsnAsn: 0.87 ± 0.039
1.903AsnPro: 1.903 ± 0.039
0.957AsnGln: 0.957 ± 0.029
1.697AsnArg: 1.697 ± 0.039
1.474AsnSer: 1.474 ± 0.037
1.662AsnThr: 1.662 ± 0.04
1.998AsnVal: 1.998 ± 0.05
0.474AsnTrp: 0.474 ± 0.02
0.784AsnTyr: 0.784 ± 0.029
0.0AsnXaa: 0.0 ± 0.0
Pro
6.864ProAla: 6.864 ± 0.092
0.365ProCys: 0.365 ± 0.018
2.993ProAsp: 2.993 ± 0.048
3.237ProGlu: 3.237 ± 0.048
1.833ProPhe: 1.833 ± 0.037
4.701ProGly: 4.701 ± 0.068
1.075ProHis: 1.075 ± 0.026
1.845ProIle: 1.845 ± 0.036
1.706ProLys: 1.706 ± 0.036
5.167ProLeu: 5.167 ± 0.068
1.32ProMet: 1.32 ± 0.033
1.265ProAsn: 1.265 ± 0.03
2.436ProPro: 2.436 ± 0.058
2.099ProGln: 2.099 ± 0.04
2.652ProArg: 2.652 ± 0.05
2.718ProSer: 2.718 ± 0.047
2.528ProThr: 2.528 ± 0.044
4.424ProVal: 4.424 ± 0.071
0.735ProTrp: 0.735 ± 0.023
1.163ProTyr: 1.163 ± 0.031
0.0ProXaa: 0.0 ± 0.0
Gln
5.559GlnAla: 5.559 ± 0.076
0.3GlnCys: 0.3 ± 0.015
1.594GlnAsp: 1.594 ± 0.038
1.645GlnGlu: 1.645 ± 0.037
1.36GlnPhe: 1.36 ± 0.033
3.031GlnGly: 3.031 ± 0.052
0.961GlnHis: 0.961 ± 0.026
1.83GlnIle: 1.83 ± 0.033
1.362GlnLys: 1.362 ± 0.03
4.331GlnLeu: 4.331 ± 0.055
0.998GlnMet: 0.998 ± 0.026
0.967GlnAsn: 0.967 ± 0.028
2.271GlnPro: 2.271 ± 0.051
1.881GlnGln: 1.881 ± 0.037
3.058GlnArg: 3.058 ± 0.049
2.119GlnSer: 2.119 ± 0.038
2.122GlnThr: 2.122 ± 0.042
3.046GlnVal: 3.046 ± 0.045
0.639GlnTrp: 0.639 ± 0.022
0.791GlnTyr: 0.791 ± 0.028
0.0GlnXaa: 0.0 ± 0.0
Arg
6.81ArgAla: 6.81 ± 0.087
0.546ArgCys: 0.546 ± 0.02
3.114ArgAsp: 3.114 ± 0.053
3.889ArgGlu: 3.889 ± 0.063
2.606ArgPhe: 2.606 ± 0.04
4.262ArgGly: 4.262 ± 0.062
1.586ArgHis: 1.586 ± 0.03
3.312ArgIle: 3.312 ± 0.052
2.289ArgLys: 2.289 ± 0.046
7.074ArgLeu: 7.074 ± 0.083
1.807ArgMet: 1.807 ± 0.037
1.805ArgAsn: 1.805 ± 0.037
2.876ArgPro: 2.876 ± 0.052
2.723ArgGln: 2.723 ± 0.046
4.114ArgArg: 4.114 ± 0.066
3.455ArgSer: 3.455 ± 0.051
2.945ArgThr: 2.945 ± 0.049
4.668ArgVal: 4.668 ± 0.059
1.042ArgTrp: 1.042 ± 0.03
1.696ArgTyr: 1.696 ± 0.037
0.0ArgXaa: 0.0 ± 0.0
Ser
6.548SerAla: 6.548 ± 0.071
0.537SerCys: 0.537 ± 0.019
2.592SerAsp: 2.592 ± 0.045
2.691SerGlu: 2.691 ± 0.052
2.279SerPhe: 2.279 ± 0.044
5.501SerGly: 5.501 ± 0.083
1.267SerHis: 1.267 ± 0.034
2.486SerIle: 2.486 ± 0.048
1.941SerLys: 1.941 ± 0.039
5.993SerLeu: 5.993 ± 0.073
1.507SerMet: 1.507 ± 0.033
1.623SerAsn: 1.623 ± 0.042
3.086SerPro: 3.086 ± 0.049
2.031SerGln: 2.031 ± 0.04
3.614SerArg: 3.614 ± 0.052
3.443SerSer: 3.443 ± 0.068
3.104SerThr: 3.104 ± 0.055
4.302SerVal: 4.302 ± 0.062
0.843SerTrp: 0.843 ± 0.028
1.498SerTyr: 1.498 ± 0.044
0.0SerXaa: 0.0 ± 0.0
Thr
6.064ThrAla: 6.064 ± 0.097
0.437ThrCys: 0.437 ± 0.015
2.549ThrAsp: 2.549 ± 0.045
2.504ThrGlu: 2.504 ± 0.039
1.877ThrPhe: 1.877 ± 0.038
4.97ThrGly: 4.97 ± 0.102
1.206ThrHis: 1.206 ± 0.028
2.147ThrIle: 2.147 ± 0.04
1.518ThrLys: 1.518 ± 0.036
6.243ThrLeu: 6.243 ± 0.084
1.198ThrMet: 1.198 ± 0.034
1.248ThrAsn: 1.248 ± 0.037
3.54ThrPro: 3.54 ± 0.049
2.07ThrGln: 2.07 ± 0.041
3.214ThrArg: 3.214 ± 0.056
2.99ThrSer: 2.99 ± 0.06
2.915ThrThr: 2.915 ± 0.079
4.372ThrVal: 4.372 ± 0.067
0.689ThrTrp: 0.689 ± 0.024
1.194ThrTyr: 1.194 ± 0.046
0.0ThrXaa: 0.0 ± 0.0
Val
9.309ValAla: 9.309 ± 0.084
0.736ValCys: 0.736 ± 0.025
3.83ValAsp: 3.83 ± 0.058
4.033ValGlu: 4.033 ± 0.056
2.913ValPhe: 2.913 ± 0.049
5.547ValGly: 5.547 ± 0.077
1.625ValHis: 1.625 ± 0.037
3.656ValIle: 3.656 ± 0.059
2.933ValLys: 2.933 ± 0.052
8.578ValLeu: 8.578 ± 0.105
2.116ValMet: 2.116 ± 0.043
2.294ValAsn: 2.294 ± 0.049
3.972ValPro: 3.972 ± 0.068
3.018ValGln: 3.018 ± 0.052
4.63ValArg: 4.63 ± 0.062
4.485ValSer: 4.485 ± 0.062
4.208ValThr: 4.208 ± 0.089
6.497ValVal: 6.497 ± 0.08
1.034ValTrp: 1.034 ± 0.028
1.716ValTyr: 1.716 ± 0.043
0.0ValXaa: 0.0 ± 0.0
Trp
1.396TrpAla: 1.396 ± 0.036
0.191TrpCys: 0.191 ± 0.012
0.583TrpAsp: 0.583 ± 0.02
0.577TrpGlu: 0.577 ± 0.022
0.569TrpPhe: 0.569 ± 0.02
0.941TrpGly: 0.941 ± 0.029
0.367TrpHis: 0.367 ± 0.016
0.667TrpIle: 0.667 ± 0.024
0.534TrpLys: 0.534 ± 0.021
2.133TrpLeu: 2.133 ± 0.049
0.461TrpMet: 0.461 ± 0.019
0.429TrpAsn: 0.429 ± 0.019
0.718TrpPro: 0.718 ± 0.026
0.712TrpGln: 0.712 ± 0.024
1.095TrpArg: 1.095 ± 0.032
0.802TrpSer: 0.802 ± 0.024
0.78TrpThr: 0.78 ± 0.027
1.042TrpVal: 1.042 ± 0.029
0.275TrpTrp: 0.275 ± 0.016
0.314TrpTyr: 0.314 ± 0.016
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.578TyrAla: 2.578 ± 0.047
0.248TyrCys: 0.248 ± 0.013
1.26TyrAsp: 1.26 ± 0.063
1.21TyrGlu: 1.21 ± 0.031
1.012TyrPhe: 1.012 ± 0.027
2.083TyrGly: 2.083 ± 0.043
0.429TyrHis: 0.429 ± 0.016
0.86TyrIle: 0.86 ± 0.025
0.839TyrLys: 0.839 ± 0.025
2.48TyrLeu: 2.48 ± 0.048
0.481TyrMet: 0.481 ± 0.019
0.642TyrAsn: 0.642 ± 0.033
1.227TyrPro: 1.227 ± 0.032
0.858TyrGln: 0.858 ± 0.028
1.648TyrArg: 1.648 ± 0.035
1.358TyrSer: 1.358 ± 0.036
1.31TyrThr: 1.31 ± 0.044
1.719TyrVal: 1.719 ± 0.038
0.378TyrTrp: 0.378 ± 0.018
0.574TyrTyr: 0.574 ± 0.028
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 4286 proteins (1354678 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