Amino acid dipepetide frequency for alpha proteobacterium HIMB59

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
3.927AlaAla: 3.927 ± 0.145
0.618AlaCys: 0.618 ± 0.041
2.502AlaAsp: 2.502 ± 0.082
3.068AlaGlu: 3.068 ± 0.096
2.747AlaPhe: 2.747 ± 0.089
3.991AlaGly: 3.991 ± 0.127
1.023AlaHis: 1.023 ± 0.056
4.956AlaIle: 4.956 ± 0.124
4.13AlaLys: 4.13 ± 0.112
5.656AlaLeu: 5.656 ± 0.125
1.513AlaMet: 1.513 ± 0.072
2.712AlaAsn: 2.712 ± 0.071
1.654AlaPro: 1.654 ± 0.072
1.762AlaGln: 1.762 ± 0.068
1.769AlaArg: 1.769 ± 0.068
3.757AlaSer: 3.757 ± 0.085
2.661AlaThr: 2.661 ± 0.085
3.218AlaVal: 3.218 ± 0.1
0.563AlaTrp: 0.563 ± 0.033
1.838AlaTyr: 1.838 ± 0.058
0.0AlaXaa: 0.0 ± 0.0
Cys
0.561CysAla: 0.561 ± 0.039
0.117CysCys: 0.117 ± 0.018
0.55CysAsp: 0.55 ± 0.041
0.543CysGlu: 0.543 ± 0.037
0.576CysPhe: 0.576 ± 0.036
0.841CysGly: 0.841 ± 0.048
0.263CysHis: 0.263 ± 0.023
0.793CysIle: 0.793 ± 0.037
0.583CysLys: 0.583 ± 0.034
1.02CysLeu: 1.02 ± 0.05
0.181CysMet: 0.181 ± 0.019
0.497CysAsn: 0.497 ± 0.036
0.398CysPro: 0.398 ± 0.032
0.314CysGln: 0.314 ± 0.026
0.314CysArg: 0.314 ± 0.031
0.749CysSer: 0.749 ± 0.041
0.435CysThr: 0.435 ± 0.035
0.548CysVal: 0.548 ± 0.032
0.095CysTrp: 0.095 ± 0.013
0.34CysTyr: 0.34 ± 0.029
0.0CysXaa: 0.0 ± 0.0
Asp
2.646AspAla: 2.646 ± 0.089
0.523AspCys: 0.523 ± 0.036
2.538AspAsp: 2.538 ± 0.081
3.556AspGlu: 3.556 ± 0.096
3.308AspPhe: 3.308 ± 0.092
2.957AspGly: 2.957 ± 0.09
1.157AspHis: 1.157 ± 0.054
4.987AspIle: 4.987 ± 0.105
4.006AspLys: 4.006 ± 0.096
6.206AspLeu: 6.206 ± 0.123
1.091AspMet: 1.091 ± 0.057
2.827AspAsn: 2.827 ± 0.082
2.076AspPro: 2.076 ± 0.075
2.493AspGln: 2.493 ± 0.08
1.782AspArg: 1.782 ± 0.059
2.982AspSer: 2.982 ± 0.086
2.259AspThr: 2.259 ± 0.072
2.993AspVal: 2.993 ± 0.095
0.583AspTrp: 0.583 ± 0.032
2.341AspTyr: 2.341 ± 0.079
0.0AspXaa: 0.0 ± 0.0
Glu
3.37GluAla: 3.37 ± 0.107
0.517GluCys: 0.517 ± 0.038
3.258GluAsp: 3.258 ± 0.088
4.159GluGlu: 4.159 ± 0.111
2.948GluPhe: 2.948 ± 0.084
3.154GluGly: 3.154 ± 0.095
1.018GluHis: 1.018 ± 0.056
6.577GluIle: 6.577 ± 0.153
6.283GluLys: 6.283 ± 0.148
5.822GluLeu: 5.822 ± 0.112
1.433GluMet: 1.433 ± 0.06
4.667GluAsn: 4.667 ± 0.114
1.553GluPro: 1.553 ± 0.061
1.944GluGln: 1.944 ± 0.067
1.961GluArg: 1.961 ± 0.067
3.213GluSer: 3.213 ± 0.093
2.65GluThr: 2.65 ± 0.075
3.646GluVal: 3.646 ± 0.104
0.486GluTrp: 0.486 ± 0.035
2.074GluTyr: 2.074 ± 0.072
0.0GluXaa: 0.0 ± 0.0
Phe
2.838PheAla: 2.838 ± 0.078
0.596PheCys: 0.596 ± 0.04
3.507PheAsp: 3.507 ± 0.104
3.39PheGlu: 3.39 ± 0.082
3.905PhePhe: 3.905 ± 0.137
3.593PheGly: 3.593 ± 0.086
1.106PheHis: 1.106 ± 0.047
5.385PheIle: 5.385 ± 0.151
4.176PheLys: 4.176 ± 0.103
5.95PheLeu: 5.95 ± 0.162
1.031PheMet: 1.031 ± 0.053
3.618PheAsn: 3.618 ± 0.1
1.754PhePro: 1.754 ± 0.061
2.235PheGln: 2.235 ± 0.062
1.416PheArg: 1.416 ± 0.055
4.444PheSer: 4.444 ± 0.125
2.489PheThr: 2.489 ± 0.08
2.77PheVal: 2.77 ± 0.104
0.504PheTrp: 0.504 ± 0.034
2.363PheTyr: 2.363 ± 0.087
0.0PheXaa: 0.0 ± 0.0
Gly
3.737GlyAla: 3.737 ± 0.108
0.786GlyCys: 0.786 ± 0.035
3.074GlyAsp: 3.074 ± 0.086
3.247GlyGlu: 3.247 ± 0.112
3.366GlyPhe: 3.366 ± 0.085
4.578GlyGly: 4.578 ± 0.121
1.268GlyHis: 1.268 ± 0.06
5.411GlyIle: 5.411 ± 0.128
4.388GlyLys: 4.388 ± 0.109
5.992GlyLeu: 5.992 ± 0.142
1.714GlyMet: 1.714 ± 0.067
2.741GlyAsn: 2.741 ± 0.095
1.767GlyPro: 1.767 ± 0.064
1.833GlyGln: 1.833 ± 0.067
2.047GlyArg: 2.047 ± 0.072
4.47GlySer: 4.47 ± 0.105
3.041GlyThr: 3.041 ± 0.079
4.002GlyVal: 4.002 ± 0.108
0.696GlyTrp: 0.696 ± 0.055
2.436GlyTyr: 2.436 ± 0.08
0.0GlyXaa: 0.0 ± 0.0
His
0.961HisAla: 0.961 ± 0.05
0.241HisCys: 0.241 ± 0.021
1.027HisAsp: 1.027 ± 0.053
1.023HisGlu: 1.023 ± 0.047
0.974HisPhe: 0.974 ± 0.046
1.281HisGly: 1.281 ± 0.061
0.561HisHis: 0.561 ± 0.037
1.491HisIle: 1.491 ± 0.065
1.23HisLys: 1.23 ± 0.053
1.895HisLeu: 1.895 ± 0.077
0.353HisMet: 0.353 ± 0.03
0.941HisAsn: 0.941 ± 0.048
0.875HisPro: 0.875 ± 0.049
0.967HisGln: 0.967 ± 0.04
0.7HisArg: 0.7 ± 0.04
1.385HisSer: 1.385 ± 0.053
0.78HisThr: 0.78 ± 0.041
0.914HisVal: 0.914 ± 0.046
0.17HisTrp: 0.17 ± 0.022
0.753HisTyr: 0.753 ± 0.036
0.0HisXaa: 0.0 ± 0.0
Ile
5.376IleAla: 5.376 ± 0.116
1.076IleCys: 1.076 ± 0.051
5.486IleAsp: 5.486 ± 0.125
5.979IleGlu: 5.979 ± 0.117
5.654IlePhe: 5.654 ± 0.165
5.588IleGly: 5.588 ± 0.15
1.626IleHis: 1.626 ± 0.065
8.669IleIle: 8.669 ± 0.186
7.984IleLys: 7.984 ± 0.17
8.898IleLeu: 8.898 ± 0.212
1.714IleMet: 1.714 ± 0.058
6.515IleAsn: 6.515 ± 0.162
3.425IlePro: 3.425 ± 0.096
3.065IleGln: 3.065 ± 0.084
2.699IleArg: 2.699 ± 0.076
7.836IleSer: 7.836 ± 0.144
4.404IleThr: 4.404 ± 0.096
4.514IleVal: 4.514 ± 0.103
0.687IleTrp: 0.687 ± 0.034
3.364IleTyr: 3.364 ± 0.091
0.0IleXaa: 0.0 ± 0.0
Lys
3.602LysAla: 3.602 ± 0.11
0.484LysCys: 0.484 ± 0.036
4.797LysAsp: 4.797 ± 0.121
5.566LysGlu: 5.566 ± 0.116
4.375LysPhe: 4.375 ± 0.117
3.865LysGly: 3.865 ± 0.112
1.241LysHis: 1.241 ± 0.046
9.481LysIle: 9.481 ± 0.178
10.098LysLys: 10.098 ± 0.224
7.308LysLeu: 7.308 ± 0.135
1.771LysMet: 1.771 ± 0.057
7.684LysAsn: 7.684 ± 0.171
2.403LysPro: 2.403 ± 0.078
2.487LysGln: 2.487 ± 0.095
2.56LysArg: 2.56 ± 0.082
6.29LysSer: 6.29 ± 0.148
3.96LysThr: 3.96 ± 0.101
4.366LysVal: 4.366 ± 0.099
0.565LysTrp: 0.565 ± 0.036
3.099LysTyr: 3.099 ± 0.093
0.0LysXaa: 0.0 ± 0.0
Leu
5.672LeuAla: 5.672 ± 0.144
0.844LeuCys: 0.844 ± 0.044
5.396LeuAsp: 5.396 ± 0.118
5.957LeuGlu: 5.957 ± 0.116
5.519LeuPhe: 5.519 ± 0.173
6.16LeuGly: 6.16 ± 0.148
1.55LeuHis: 1.55 ± 0.057
9.583LeuIle: 9.583 ± 0.19
8.916LeuLys: 8.916 ± 0.167
8.73LeuLeu: 8.73 ± 0.194
2.209LeuMet: 2.209 ± 0.077
6.884LeuAsn: 6.884 ± 0.146
3.492LeuPro: 3.492 ± 0.094
2.9LeuGln: 2.9 ± 0.076
3.054LeuArg: 3.054 ± 0.077
8.693LeuSer: 8.693 ± 0.182
4.488LeuThr: 4.488 ± 0.103
5.325LeuVal: 5.325 ± 0.111
0.769LeuTrp: 0.769 ± 0.048
2.878LeuTyr: 2.878 ± 0.084
0.0LeuXaa: 0.0 ± 0.0
Met
1.526MetAla: 1.526 ± 0.063
0.192MetCys: 0.192 ± 0.018
1.02MetAsp: 1.02 ± 0.053
1.065MetGlu: 1.065 ± 0.051
0.947MetPhe: 0.947 ± 0.044
1.539MetGly: 1.539 ± 0.057
0.347MetHis: 0.347 ± 0.03
1.952MetIle: 1.952 ± 0.073
1.935MetLys: 1.935 ± 0.062
1.778MetLeu: 1.778 ± 0.059
0.634MetMet: 0.634 ± 0.044
1.515MetAsn: 1.515 ± 0.057
0.93MetPro: 0.93 ± 0.05
0.691MetGln: 0.691 ± 0.037
0.762MetArg: 0.762 ± 0.046
1.815MetSer: 1.815 ± 0.06
1.272MetThr: 1.272 ± 0.06
1.224MetVal: 1.224 ± 0.052
0.166MetTrp: 0.166 ± 0.022
0.57MetTyr: 0.57 ± 0.034
0.0MetXaa: 0.0 ± 0.0
Asn
2.566AsnAla: 2.566 ± 0.073
0.616AsnCys: 0.616 ± 0.042
3.205AsnAsp: 3.205 ± 0.09
3.839AsnGlu: 3.839 ± 0.123
4.426AsnPhe: 4.426 ± 0.124
2.661AsnGly: 2.661 ± 0.079
1.243AsnHis: 1.243 ± 0.053
6.288AsnIle: 6.288 ± 0.13
5.917AsnLys: 5.917 ± 0.149
7.2AsnLeu: 7.2 ± 0.178
1.213AsnMet: 1.213 ± 0.056
4.519AsnAsn: 4.519 ± 0.146
2.383AsnPro: 2.383 ± 0.067
2.902AsnGln: 2.902 ± 0.095
1.802AsnArg: 1.802 ± 0.063
4.771AsnSer: 4.771 ± 0.125
2.688AsnThr: 2.688 ± 0.09
2.898AsnVal: 2.898 ± 0.086
0.636AsnTrp: 0.636 ± 0.038
2.966AsnTyr: 2.966 ± 0.085
0.0AsnXaa: 0.0 ± 0.0
Pro
1.698ProAla: 1.698 ± 0.069
0.307ProCys: 0.307 ± 0.027
1.888ProAsp: 1.888 ± 0.061
2.328ProGlu: 2.328 ± 0.077
1.879ProPhe: 1.879 ± 0.063
2.122ProGly: 2.122 ± 0.08
0.711ProHis: 0.711 ± 0.048
3.088ProIle: 3.088 ± 0.083
2.666ProLys: 2.666 ± 0.087
3.304ProLeu: 3.304 ± 0.093
0.68ProMet: 0.68 ± 0.04
2.005ProAsn: 2.005 ± 0.064
0.89ProPro: 0.89 ± 0.045
1.062ProGln: 1.062 ± 0.051
0.994ProArg: 0.994 ± 0.049
2.54ProSer: 2.54 ± 0.08
1.769ProThr: 1.769 ± 0.073
1.97ProVal: 1.97 ± 0.063
0.351ProTrp: 0.351 ± 0.027
1.237ProTyr: 1.237 ± 0.061
0.0ProXaa: 0.0 ± 0.0
Gln
1.888GlnAla: 1.888 ± 0.068
0.28GlnCys: 0.28 ± 0.026
1.747GlnAsp: 1.747 ± 0.065
2.169GlnGlu: 2.169 ± 0.08
1.718GlnPhe: 1.718 ± 0.066
1.813GlnGly: 1.813 ± 0.054
0.506GlnHis: 0.506 ± 0.035
3.375GlnIle: 3.375 ± 0.096
3.562GlnLys: 3.562 ± 0.09
3.112GlnLeu: 3.112 ± 0.083
0.771GlnMet: 0.771 ± 0.044
2.675GlnAsn: 2.675 ± 0.087
0.941GlnPro: 0.941 ± 0.047
1.16GlnGln: 1.16 ± 0.049
1.164GlnArg: 1.164 ± 0.057
2.732GlnSer: 2.732 ± 0.078
1.584GlnThr: 1.584 ± 0.065
1.732GlnVal: 1.732 ± 0.064
0.38GlnTrp: 0.38 ± 0.035
1.173GlnTyr: 1.173 ± 0.055
0.0GlnXaa: 0.0 ± 0.0
Arg
1.756ArgAla: 1.756 ± 0.07
0.294ArgCys: 0.294 ± 0.027
1.745ArgAsp: 1.745 ± 0.069
2.027ArgGlu: 2.027 ± 0.07
1.623ArgPhe: 1.623 ± 0.064
1.882ArgGly: 1.882 ± 0.069
0.576ArgHis: 0.576 ± 0.036
2.666ArgIle: 2.666 ± 0.075
2.522ArgLys: 2.522 ± 0.078
2.982ArgLeu: 2.982 ± 0.092
0.755ArgMet: 0.755 ± 0.043
1.802ArgAsn: 1.802 ± 0.066
1.12ArgPro: 1.12 ± 0.044
1.109ArgGln: 1.109 ± 0.053
1.179ArgArg: 1.179 ± 0.056
2.399ArgSer: 2.399 ± 0.074
1.319ArgThr: 1.319 ± 0.052
2.032ArgVal: 2.032 ± 0.077
0.287ArgTrp: 0.287 ± 0.026
1.215ArgTyr: 1.215 ± 0.055
0.0ArgXaa: 0.0 ± 0.0
Ser
3.576SerAla: 3.576 ± 0.093
0.658SerCys: 0.658 ± 0.038
3.704SerAsp: 3.704 ± 0.105
4.21SerGlu: 4.21 ± 0.099
4.612SerPhe: 4.612 ± 0.111
4.64SerGly: 4.64 ± 0.107
1.389SerHis: 1.389 ± 0.059
7.143SerIle: 7.143 ± 0.138
6.769SerLys: 6.769 ± 0.157
7.986SerLeu: 7.986 ± 0.14
1.707SerMet: 1.707 ± 0.068
4.729SerAsn: 4.729 ± 0.124
2.35SerPro: 2.35 ± 0.077
2.498SerGln: 2.498 ± 0.072
2.319SerArg: 2.319 ± 0.071
5.904SerSer: 5.904 ± 0.116
3.258SerThr: 3.258 ± 0.084
3.779SerVal: 3.779 ± 0.094
0.713SerTrp: 0.713 ± 0.041
2.717SerTyr: 2.717 ± 0.084
0.0SerXaa: 0.0 ± 0.0
Thr
2.708ThrAla: 2.708 ± 0.089
0.391ThrCys: 0.391 ± 0.035
2.27ThrAsp: 2.27 ± 0.074
2.326ThrGlu: 2.326 ± 0.077
2.443ThrPhe: 2.443 ± 0.072
3.227ThrGly: 3.227 ± 0.097
0.994ThrHis: 0.994 ± 0.048
4.227ThrIle: 4.227 ± 0.093
3.62ThrLys: 3.62 ± 0.087
4.713ThrLeu: 4.713 ± 0.103
0.901ThrMet: 0.901 ± 0.047
2.858ThrAsn: 2.858 ± 0.086
1.977ThrPro: 1.977 ± 0.057
1.416ThrGln: 1.416 ± 0.067
1.374ThrArg: 1.374 ± 0.052
3.375ThrSer: 3.375 ± 0.093
2.485ThrThr: 2.485 ± 0.088
2.679ThrVal: 2.679 ± 0.084
0.409ThrTrp: 0.409 ± 0.035
1.63ThrTyr: 1.63 ± 0.06
0.0ThrXaa: 0.0 ± 0.0
Val
3.377ValAla: 3.377 ± 0.104
0.625ValCys: 0.625 ± 0.035
2.995ValAsp: 2.995 ± 0.087
3.348ValGlu: 3.348 ± 0.086
2.933ValPhe: 2.933 ± 0.093
3.752ValGly: 3.752 ± 0.116
0.959ValHis: 0.959 ± 0.046
5.168ValIle: 5.168 ± 0.123
3.918ValLys: 3.918 ± 0.105
5.157ValLeu: 5.157 ± 0.114
1.307ValMet: 1.307 ± 0.054
3.079ValAsn: 3.079 ± 0.088
1.915ValPro: 1.915 ± 0.07
1.612ValGln: 1.612 ± 0.057
1.785ValArg: 1.785 ± 0.063
3.927ValSer: 3.927 ± 0.093
2.624ValThr: 2.624 ± 0.083
3.406ValVal: 3.406 ± 0.114
0.459ValTrp: 0.459 ± 0.033
1.895ValTyr: 1.895 ± 0.063
0.0ValXaa: 0.0 ± 0.0
Trp
0.493TrpAla: 0.493 ± 0.034
0.113TrpCys: 0.113 ± 0.017
0.521TrpAsp: 0.521 ± 0.038
0.506TrpGlu: 0.506 ± 0.04
0.468TrpPhe: 0.468 ± 0.034
0.669TrpGly: 0.669 ± 0.044
0.199TrpHis: 0.199 ± 0.019
0.707TrpIle: 0.707 ± 0.036
0.665TrpLys: 0.665 ± 0.036
0.899TrpLeu: 0.899 ± 0.044
0.289TrpMet: 0.289 ± 0.025
0.521TrpAsn: 0.521 ± 0.036
0.336TrpPro: 0.336 ± 0.03
0.292TrpGln: 0.292 ± 0.025
0.342TrpArg: 0.342 ± 0.026
0.682TrpSer: 0.682 ± 0.04
0.426TrpThr: 0.426 ± 0.031
0.488TrpVal: 0.488 ± 0.037
0.135TrpTrp: 0.135 ± 0.021
0.287TrpTyr: 0.287 ± 0.027
0.0TrpXaa: 0.0 ± 0.0
Tyr
1.789TyrAla: 1.789 ± 0.068
0.44TyrCys: 0.44 ± 0.026
2.083TyrAsp: 2.083 ± 0.07
2.432TyrGlu: 2.432 ± 0.083
2.646TyrPhe: 2.646 ± 0.1
2.279TyrGly: 2.279 ± 0.07
0.784TyrHis: 0.784 ± 0.045
2.615TyrIle: 2.615 ± 0.071
2.633TyrLys: 2.633 ± 0.093
4.408TyrLeu: 4.408 ± 0.115
0.61TyrMet: 0.61 ± 0.04
1.95TyrAsn: 1.95 ± 0.073
1.254TyrPro: 1.254 ± 0.055
1.738TyrGln: 1.738 ± 0.065
1.266TyrArg: 1.266 ± 0.052
2.697TyrSer: 2.697 ± 0.069
1.429TyrThr: 1.429 ± 0.059
1.738TyrVal: 1.738 ± 0.063
0.384TyrTrp: 0.384 ± 0.026
1.4TyrTyr: 1.4 ± 0.065
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 1493 proteins (452782 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