Amino acid dipepetide frequency for Azospirillum sp. CAG:239

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
9.893AlaAla: 9.893 ± 0.205
1.086AlaCys: 1.086 ± 0.054
5.436AlaAsp: 5.436 ± 0.108
7.133AlaGlu: 7.133 ± 0.145
3.706AlaPhe: 3.706 ± 0.096
6.641AlaGly: 6.641 ± 0.13
1.138AlaHis: 1.138 ± 0.053
4.086AlaIle: 4.086 ± 0.099
5.685AlaLys: 5.685 ± 0.126
8.277AlaLeu: 8.277 ± 0.145
2.038AlaMet: 2.038 ± 0.068
3.057AlaAsn: 3.057 ± 0.089
3.053AlaPro: 3.053 ± 0.094
2.95AlaGln: 2.95 ± 0.074
4.208AlaArg: 4.208 ± 0.097
4.442AlaSer: 4.442 ± 0.1
2.89AlaThr: 2.89 ± 0.088
7.286AlaVal: 7.286 ± 0.133
0.739AlaTrp: 0.739 ± 0.045
2.925AlaTyr: 2.925 ± 0.093
0.0AlaXaa: 0.0 ± 0.0
Cys
1.042CysAla: 1.042 ± 0.048
0.278CysCys: 0.278 ± 0.026
0.686CysAsp: 0.686 ± 0.043
0.713CysGlu: 0.713 ± 0.042
0.651CysPhe: 0.651 ± 0.034
1.345CysGly: 1.345 ± 0.066
0.216CysHis: 0.216 ± 0.023
0.739CysIle: 0.739 ± 0.044
0.709CysLys: 0.709 ± 0.044
1.134CysLeu: 1.134 ± 0.047
0.272CysMet: 0.272 ± 0.021
0.483CysAsn: 0.483 ± 0.035
0.787CysPro: 0.787 ± 0.049
0.366CysGln: 0.366 ± 0.026
0.967CysArg: 0.967 ± 0.047
0.877CysSer: 0.877 ± 0.05
0.54CysThr: 0.54 ± 0.045
0.739CysVal: 0.739 ± 0.035
0.134CysTrp: 0.134 ± 0.016
0.444CysTyr: 0.444 ± 0.031
0.0CysXaa: 0.0 ± 0.0
Asp
4.469AspAla: 4.469 ± 0.099
0.841AspCys: 0.841 ± 0.046
3.279AspAsp: 3.279 ± 0.09
4.432AspGlu: 4.432 ± 0.119
3.266AspPhe: 3.266 ± 0.071
4.473AspGly: 4.473 ± 0.115
0.623AspHis: 0.623 ± 0.031
4.36AspIle: 4.36 ± 0.108
4.262AspLys: 4.262 ± 0.094
4.637AspLeu: 4.637 ± 0.099
1.73AspMet: 1.73 ± 0.055
2.946AspAsn: 2.946 ± 0.078
1.55AspPro: 1.55 ± 0.06
0.908AspGln: 0.908 ± 0.046
2.714AspArg: 2.714 ± 0.073
2.659AspSer: 2.659 ± 0.072
2.392AspThr: 2.392 ± 0.07
3.973AspVal: 3.973 ± 0.089
0.688AspTrp: 0.688 ± 0.035
2.383AspTyr: 2.383 ± 0.078
0.0AspXaa: 0.0 ± 0.0
Glu
5.865GluAla: 5.865 ± 0.118
0.624GluCys: 0.624 ± 0.037
3.626GluAsp: 3.626 ± 0.079
5.379GluGlu: 5.379 ± 0.141
2.628GluPhe: 2.628 ± 0.068
3.609GluGly: 3.609 ± 0.089
1.182GluHis: 1.182 ± 0.047
5.354GluIle: 5.354 ± 0.101
6.568GluLys: 6.568 ± 0.142
6.147GluLeu: 6.147 ± 0.114
1.998GluMet: 1.998 ± 0.069
4.647GluAsn: 4.647 ± 0.086
2.038GluPro: 2.038 ± 0.085
2.54GluGln: 2.54 ± 0.075
3.628GluArg: 3.628 ± 0.088
2.396GluSer: 2.396 ± 0.07
3.896GluThr: 3.896 ± 0.106
4.164GluVal: 4.164 ± 0.102
0.536GluTrp: 0.536 ± 0.028
2.207GluTyr: 2.207 ± 0.078
0.0GluXaa: 0.0 ± 0.0
Phe
4.354PheAla: 4.354 ± 0.103
0.76PheCys: 0.76 ± 0.041
2.969PheAsp: 2.969 ± 0.078
2.745PheGlu: 2.745 ± 0.072
2.13PhePhe: 2.13 ± 0.079
3.478PheGly: 3.478 ± 0.098
0.615PheHis: 0.615 ± 0.036
2.862PheIle: 2.862 ± 0.083
2.402PheLys: 2.402 ± 0.068
4.208PheLeu: 4.208 ± 0.115
1.278PheMet: 1.278 ± 0.06
2.097PheAsn: 2.097 ± 0.071
1.454PhePro: 1.454 ± 0.058
1.057PheGln: 1.057 ± 0.046
2.247PheArg: 2.247 ± 0.063
3.145PheSer: 3.145 ± 0.083
1.904PheThr: 1.904 ± 0.056
3.312PheVal: 3.312 ± 0.086
0.58PheTrp: 0.58 ± 0.039
1.801PheTyr: 1.801 ± 0.066
0.0PheXaa: 0.0 ± 0.0
Gly
4.999GlyAla: 4.999 ± 0.12
1.071GlyCys: 1.071 ± 0.048
3.559GlyAsp: 3.559 ± 0.078
4.383GlyGlu: 4.383 ± 0.091
3.362GlyPhe: 3.362 ± 0.087
5.041GlyGly: 5.041 ± 0.143
1.26GlyHis: 1.26 ± 0.06
5.149GlyIle: 5.149 ± 0.118
5.417GlyLys: 5.417 ± 0.106
6.478GlyLeu: 6.478 ± 0.114
1.973GlyMet: 1.973 ± 0.08
3.134GlyAsn: 3.134 ± 0.116
1.331GlyPro: 1.331 ± 0.054
2.207GlyGln: 2.207 ± 0.076
4.049GlyArg: 4.049 ± 0.101
4.258GlySer: 4.258 ± 0.12
3.582GlyThr: 3.582 ± 0.142
4.586GlyVal: 4.586 ± 0.091
0.85GlyTrp: 0.85 ± 0.042
2.737GlyTyr: 2.737 ± 0.082
0.0GlyXaa: 0.0 ± 0.0
His
1.082HisAla: 1.082 ± 0.055
0.239HisCys: 0.239 ± 0.023
0.82HisAsp: 0.82 ± 0.047
0.948HisGlu: 0.948 ± 0.045
0.77HisPhe: 0.77 ± 0.036
1.151HisGly: 1.151 ± 0.055
0.291HisHis: 0.291 ± 0.026
1.134HisIle: 1.134 ± 0.048
0.992HisLys: 0.992 ± 0.049
1.437HisLeu: 1.437 ± 0.049
0.324HisMet: 0.324 ± 0.028
0.833HisAsn: 0.833 ± 0.044
0.879HisPro: 0.879 ± 0.041
0.465HisGln: 0.465 ± 0.031
0.826HisArg: 0.826 ± 0.039
0.822HisSer: 0.822 ± 0.038
0.64HisThr: 0.64 ± 0.041
0.816HisVal: 0.816 ± 0.045
0.197HisTrp: 0.197 ± 0.02
0.607HisTyr: 0.607 ± 0.032
0.002HisXaa: 0.002 ± 0.002
Ile
5.946IleAla: 5.946 ± 0.111
0.866IleCys: 0.866 ± 0.046
4.088IleAsp: 4.088 ± 0.091
4.549IleGlu: 4.549 ± 0.102
2.839IlePhe: 2.839 ± 0.082
4.524IleGly: 4.524 ± 0.116
0.904IleHis: 0.904 ± 0.042
4.373IleIle: 4.373 ± 0.1
4.421IleLys: 4.421 ± 0.097
5.817IleLeu: 5.817 ± 0.11
1.561IleMet: 1.561 ± 0.055
3.241IleAsn: 3.241 ± 0.095
2.668IlePro: 2.668 ± 0.078
1.519IleGln: 1.519 ± 0.058
3.597IleArg: 3.597 ± 0.093
4.534IleSer: 4.534 ± 0.094
3.3IleThr: 3.3 ± 0.094
4.653IleVal: 4.653 ± 0.095
0.598IleTrp: 0.598 ± 0.032
2.128IleTyr: 2.128 ± 0.072
0.0IleXaa: 0.0 ± 0.0
Lys
5.806LysAla: 5.806 ± 0.118
0.699LysCys: 0.699 ± 0.045
3.923LysAsp: 3.923 ± 0.101
4.982LysGlu: 4.982 ± 0.13
2.561LysPhe: 2.561 ± 0.067
4.109LysGly: 4.109 ± 0.088
0.927LysHis: 0.927 ± 0.043
5.766LysIle: 5.766 ± 0.111
6.001LysLys: 6.001 ± 0.127
6.401LysLeu: 6.401 ± 0.111
2.103LysMet: 2.103 ± 0.059
3.971LysAsn: 3.971 ± 0.097
2.5LysPro: 2.5 ± 0.077
2.13LysGln: 2.13 ± 0.071
3.26LysArg: 3.26 ± 0.088
3.697LysSer: 3.697 ± 0.095
3.932LysThr: 3.932 ± 0.094
4.354LysVal: 4.354 ± 0.088
0.532LysTrp: 0.532 ± 0.036
2.561LysTyr: 2.561 ± 0.08
0.0LysXaa: 0.0 ± 0.0
Leu
8.273LeuAla: 8.273 ± 0.144
1.168LeuCys: 1.168 ± 0.055
5.126LeuAsp: 5.126 ± 0.102
5.789LeuGlu: 5.789 ± 0.124
4.352LeuPhe: 4.352 ± 0.109
6.248LeuGly: 6.248 ± 0.132
1.444LeuHis: 1.444 ± 0.055
5.666LeuIle: 5.666 ± 0.127
6.804LeuLys: 6.804 ± 0.126
8.943LeuLeu: 8.943 ± 0.197
2.295LeuMet: 2.295 ± 0.072
4.676LeuAsn: 4.676 ± 0.103
4.271LeuPro: 4.271 ± 0.091
2.927LeuGln: 2.927 ± 0.072
4.712LeuArg: 4.712 ± 0.108
6.681LeuSer: 6.681 ± 0.121
4.938LeuThr: 4.938 ± 0.105
5.448LeuVal: 5.448 ± 0.109
0.969LeuTrp: 0.969 ± 0.043
2.883LeuTyr: 2.883 ± 0.086
0.0LeuXaa: 0.0 ± 0.0
Met
2.26MetAla: 2.26 ± 0.067
0.197MetCys: 0.197 ± 0.02
1.327MetAsp: 1.327 ± 0.049
1.63MetGlu: 1.63 ± 0.059
1.17MetPhe: 1.17 ± 0.051
1.471MetGly: 1.471 ± 0.05
0.343MetHis: 0.343 ± 0.027
1.548MetIle: 1.548 ± 0.057
1.99MetLys: 1.99 ± 0.055
2.632MetLeu: 2.632 ± 0.065
0.659MetMet: 0.659 ± 0.036
1.234MetAsn: 1.234 ± 0.047
1.295MetPro: 1.295 ± 0.052
0.958MetGln: 0.958 ± 0.043
1.32MetArg: 1.32 ± 0.05
1.768MetSer: 1.768 ± 0.063
1.492MetThr: 1.492 ± 0.053
1.58MetVal: 1.58 ± 0.052
0.176MetTrp: 0.176 ± 0.017
0.688MetTyr: 0.688 ± 0.041
0.0MetXaa: 0.0 ± 0.0
Asn
3.936AsnAla: 3.936 ± 0.096
0.609AsnCys: 0.609 ± 0.04
2.379AsnAsp: 2.379 ± 0.069
2.787AsnGlu: 2.787 ± 0.076
2.276AsnPhe: 2.276 ± 0.073
3.682AsnGly: 3.682 ± 0.125
0.759AsnHis: 0.759 ± 0.037
3.505AsnIle: 3.505 ± 0.099
2.954AsnLys: 2.954 ± 0.077
4.656AsnLeu: 4.656 ± 0.106
1.341AsnMet: 1.341 ± 0.054
2.44AsnAsn: 2.44 ± 0.116
2.461AsnPro: 2.461 ± 0.072
1.484AsnGln: 1.484 ± 0.055
2.917AsnArg: 2.917 ± 0.074
2.484AsnSer: 2.484 ± 0.084
2.084AsnThr: 2.084 ± 0.071
3.249AsnVal: 3.249 ± 0.108
0.511AsnTrp: 0.511 ± 0.031
1.758AsnTyr: 1.758 ± 0.062
0.0AsnXaa: 0.0 ± 0.0
Pro
3.557ProAla: 3.557 ± 0.105
0.406ProCys: 0.406 ± 0.034
2.684ProAsp: 2.684 ± 0.081
3.731ProGlu: 3.731 ± 0.085
1.695ProPhe: 1.695 ± 0.057
2.26ProGly: 2.26 ± 0.074
0.615ProHis: 0.615 ± 0.034
1.779ProIle: 1.779 ± 0.069
2.163ProLys: 2.163 ± 0.07
3.331ProLeu: 3.331 ± 0.067
0.782ProMet: 0.782 ± 0.041
1.496ProAsn: 1.496 ± 0.058
1.09ProPro: 1.09 ± 0.058
1.653ProGln: 1.653 ± 0.051
1.584ProArg: 1.584 ± 0.056
2.007ProSer: 2.007 ± 0.06
1.465ProThr: 1.465 ± 0.058
3.235ProVal: 3.235 ± 0.083
0.402ProTrp: 0.402 ± 0.027
1.465ProTyr: 1.465 ± 0.047
0.0ProXaa: 0.0 ± 0.0
Gln
2.67GlnAla: 2.67 ± 0.077
0.283GlnCys: 0.283 ± 0.024
1.504GlnAsp: 1.504 ± 0.056
2.032GlnGlu: 2.032 ± 0.067
1.044GlnPhe: 1.044 ± 0.046
1.755GlnGly: 1.755 ± 0.059
0.431GlnHis: 0.431 ± 0.028
2.348GlnIle: 2.348 ± 0.084
2.693GlnLys: 2.693 ± 0.075
2.578GlnLeu: 2.578 ± 0.079
0.975GlnMet: 0.975 ± 0.043
1.946GlnAsn: 1.946 ± 0.071
1.255GlnPro: 1.255 ± 0.049
1.159GlnGln: 1.159 ± 0.056
1.601GlnArg: 1.601 ± 0.062
1.666GlnSer: 1.666 ± 0.057
1.799GlnThr: 1.799 ± 0.061
1.95GlnVal: 1.95 ± 0.065
0.247GlnTrp: 0.247 ± 0.02
1.023GlnTyr: 1.023 ± 0.037
0.0GlnXaa: 0.0 ± 0.0
Arg
3.662ArgAla: 3.662 ± 0.08
0.642ArgCys: 0.642 ± 0.033
2.605ArgAsp: 2.605 ± 0.07
3.978ArgGlu: 3.978 ± 0.095
2.582ArgPhe: 2.582 ± 0.077
3.08ArgGly: 3.08 ± 0.085
1.013ArgHis: 1.013 ± 0.041
4.009ArgIle: 4.009 ± 0.086
3.911ArgLys: 3.911 ± 0.093
5.532ArgLeu: 5.532 ± 0.131
1.366ArgMet: 1.366 ± 0.053
2.624ArgAsn: 2.624 ± 0.067
1.912ArgPro: 1.912 ± 0.068
2.256ArgGln: 2.256 ± 0.076
3.984ArgArg: 3.984 ± 0.104
2.768ArgSer: 2.768 ± 0.08
2.31ArgThr: 2.31 ± 0.07
2.977ArgVal: 2.977 ± 0.077
0.483ArgTrp: 0.483 ± 0.031
1.77ArgTyr: 1.77 ± 0.053
0.0ArgXaa: 0.0 ± 0.0
Ser
5.181SerAla: 5.181 ± 0.107
1.021SerCys: 1.021 ± 0.084
3.197SerAsp: 3.197 ± 0.081
3.75SerGlu: 3.75 ± 0.103
2.862SerPhe: 2.862 ± 0.081
5.16SerGly: 5.16 ± 0.148
0.895SerHis: 0.895 ± 0.042
3.337SerIle: 3.337 ± 0.096
3.341SerLys: 3.341 ± 0.084
5.79SerLeu: 5.79 ± 0.119
1.325SerMet: 1.325 ± 0.049
2.078SerAsn: 2.078 ± 0.073
2.145SerPro: 2.145 ± 0.068
1.778SerGln: 1.778 ± 0.061
3.285SerArg: 3.285 ± 0.085
3.81SerSer: 3.81 ± 0.133
2.354SerThr: 2.354 ± 0.074
4.151SerVal: 4.151 ± 0.101
0.607SerTrp: 0.607 ± 0.036
2.107SerTyr: 2.107 ± 0.076
0.0SerXaa: 0.0 ± 0.0
Thr
4.881ThrAla: 4.881 ± 0.115
0.609ThrCys: 0.609 ± 0.043
2.816ThrAsp: 2.816 ± 0.075
2.934ThrGlu: 2.934 ± 0.081
2.044ThrPhe: 2.044 ± 0.069
3.95ThrGly: 3.95 ± 0.105
0.753ThrHis: 0.753 ± 0.04
2.751ThrIle: 2.751 ± 0.094
2.498ThrLys: 2.498 ± 0.079
4.568ThrLeu: 4.568 ± 0.092
0.9ThrMet: 0.9 ± 0.037
1.758ThrAsn: 1.758 ± 0.077
2.523ThrPro: 2.523 ± 0.071
1.228ThrGln: 1.228 ± 0.051
2.046ThrArg: 2.046 ± 0.06
2.603ThrSer: 2.603 ± 0.084
2.256ThrThr: 2.256 ± 0.077
3.854ThrVal: 3.854 ± 0.085
0.358ThrTrp: 0.358 ± 0.025
1.609ThrTyr: 1.609 ± 0.058
0.0ThrXaa: 0.0 ± 0.0
Val
5.17ValAla: 5.17 ± 0.104
1.14ValCys: 1.14 ± 0.052
3.923ValAsp: 3.923 ± 0.09
4.316ValGlu: 4.316 ± 0.101
3.262ValPhe: 3.262 ± 0.089
4.258ValGly: 4.258 ± 0.101
1.009ValHis: 1.009 ± 0.044
4.664ValIle: 4.664 ± 0.108
4.605ValLys: 4.605 ± 0.099
6.514ValLeu: 6.514 ± 0.119
1.737ValMet: 1.737 ± 0.061
3.191ValAsn: 3.191 ± 0.071
2.594ValPro: 2.594 ± 0.067
1.701ValGln: 1.701 ± 0.056
3.831ValArg: 3.831 ± 0.09
4.996ValSer: 4.996 ± 0.106
3.049ValThr: 3.049 ± 0.083
5.099ValVal: 5.099 ± 0.121
0.757ValTrp: 0.757 ± 0.044
2.459ValTyr: 2.459 ± 0.063
0.0ValXaa: 0.0 ± 0.0
Trp
0.672TrpAla: 0.672 ± 0.039
0.136TrpCys: 0.136 ± 0.017
0.444TrpAsp: 0.444 ± 0.029
0.636TrpGlu: 0.636 ± 0.035
0.521TrpPhe: 0.521 ± 0.036
0.726TrpGly: 0.726 ± 0.038
0.218TrpHis: 0.218 ± 0.022
0.634TrpIle: 0.634 ± 0.031
0.611TrpLys: 0.611 ± 0.034
1.147TrpLeu: 1.147 ± 0.045
0.287TrpMet: 0.287 ± 0.025
0.575TrpAsn: 0.575 ± 0.033
0.266TrpPro: 0.266 ± 0.021
0.441TrpGln: 0.441 ± 0.029
0.575TrpArg: 0.575 ± 0.034
0.565TrpSer: 0.565 ± 0.035
0.391TrpThr: 0.391 ± 0.028
0.548TrpVal: 0.548 ± 0.034
0.157TrpTrp: 0.157 ± 0.019
0.377TrpTyr: 0.377 ± 0.026
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.952TyrAla: 2.952 ± 0.085
0.446TyrCys: 0.446 ± 0.029
2.193TyrAsp: 2.193 ± 0.067
2.184TyrGlu: 2.184 ± 0.071
1.68TyrPhe: 1.68 ± 0.058
2.465TyrGly: 2.465 ± 0.079
0.64TyrHis: 0.64 ± 0.038
2.063TyrIle: 2.063 ± 0.069
2.189TyrLys: 2.189 ± 0.067
3.383TyrLeu: 3.383 ± 0.088
0.793TyrMet: 0.793 ± 0.039
1.847TyrAsn: 1.847 ± 0.071
1.327TyrPro: 1.327 ± 0.048
1.234TyrGln: 1.234 ± 0.047
2.113TyrArg: 2.113 ± 0.067
1.996TyrSer: 1.996 ± 0.06
1.722TyrThr: 1.722 ± 0.056
2.302TyrVal: 2.302 ± 0.076
0.404TyrTrp: 0.404 ± 0.028
1.448TyrTyr: 1.448 ± 0.057
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
0.002XaaPro: 0.002 ± 0.002
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
0.006XaaXaa: 0.006 ± 0.006
Statistics based on 1791 proteins (522069 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