Amino acid dipepetide frequency for Streptomyces sp. BK308

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
21.489AlaAla: 21.489 ± 0.139
1.154AlaCys: 1.154 ± 0.021
8.307AlaAsp: 8.307 ± 0.061
8.723AlaGlu: 8.723 ± 0.087
3.506AlaPhe: 3.506 ± 0.038
13.31AlaGly: 13.31 ± 0.085
3.085AlaHis: 3.085 ± 0.036
3.156AlaIle: 3.156 ± 0.043
2.764AlaLys: 2.764 ± 0.045
14.673AlaLeu: 14.673 ± 0.094
2.394AlaMet: 2.394 ± 0.03
1.85AlaAsn: 1.85 ± 0.032
7.116AlaPro: 7.116 ± 0.073
3.753AlaGln: 3.753 ± 0.041
10.606AlaArg: 10.606 ± 0.081
5.821AlaSer: 5.821 ± 0.044
7.035AlaThr: 7.035 ± 0.057
12.596AlaVal: 12.596 ± 0.075
1.907AlaTrp: 1.907 ± 0.026
2.817AlaTyr: 2.817 ± 0.039
0.0AlaXaa: 0.0 ± 0.0
Cys
1.113CysAla: 1.113 ± 0.021
0.106CysCys: 0.106 ± 0.007
0.463CysAsp: 0.463 ± 0.014
0.397CysGlu: 0.397 ± 0.012
0.23CysPhe: 0.23 ± 0.009
0.976CysGly: 0.976 ± 0.02
0.205CysHis: 0.205 ± 0.009
0.16CysIle: 0.16 ± 0.007
0.119CysLys: 0.119 ± 0.007
0.801CysLeu: 0.801 ± 0.019
0.129CysMet: 0.129 ± 0.006
0.137CysAsn: 0.137 ± 0.005
0.522CysPro: 0.522 ± 0.017
0.162CysGln: 0.162 ± 0.008
0.639CysArg: 0.639 ± 0.014
0.439CysSer: 0.439 ± 0.014
0.526CysThr: 0.526 ± 0.015
0.697CysVal: 0.697 ± 0.017
0.137CysTrp: 0.137 ± 0.008
0.155CysTyr: 0.155 ± 0.007
0.0CysXaa: 0.0 ± 0.0
Asp
7.492AspAla: 7.492 ± 0.067
0.439AspCys: 0.439 ± 0.015
3.535AspAsp: 3.535 ± 0.034
3.714AspGlu: 3.714 ± 0.045
1.656AspPhe: 1.656 ± 0.026
6.355AspGly: 6.355 ± 0.061
1.481AspHis: 1.481 ± 0.027
1.791AspIle: 1.791 ± 0.028
1.149AspLys: 1.149 ± 0.025
6.217AspLeu: 6.217 ± 0.055
0.799AspMet: 0.799 ± 0.018
0.991AspAsn: 0.991 ± 0.022
4.518AspPro: 4.518 ± 0.045
1.52AspGln: 1.52 ± 0.026
5.025AspArg: 5.025 ± 0.045
2.535AspSer: 2.535 ± 0.033
3.353AspThr: 3.353 ± 0.037
4.757AspVal: 4.757 ± 0.043
1.064AspTrp: 1.064 ± 0.02
1.135AspTyr: 1.135 ± 0.022
0.0AspXaa: 0.0 ± 0.0
Glu
7.37GluAla: 7.37 ± 0.077
0.375GluCys: 0.375 ± 0.013
2.78GluAsp: 2.78 ± 0.037
3.585GluGlu: 3.585 ± 0.052
1.407GluPhe: 1.407 ± 0.024
4.231GluGly: 4.231 ± 0.047
1.536GluHis: 1.536 ± 0.028
2.078GluIle: 2.078 ± 0.033
1.339GluLys: 1.339 ± 0.027
6.77GluLeu: 6.77 ± 0.06
0.804GluMet: 0.804 ± 0.017
0.947GluAsn: 0.947 ± 0.021
3.356GluPro: 3.356 ± 0.042
2.229GluGln: 2.229 ± 0.029
5.449GluArg: 5.449 ± 0.05
2.408GluSer: 2.408 ± 0.031
2.847GluThr: 2.847 ± 0.033
4.406GluVal: 4.406 ± 0.043
0.772GluTrp: 0.772 ± 0.016
1.119GluTyr: 1.119 ± 0.019
0.0GluXaa: 0.0 ± 0.0
Phe
3.639PheAla: 3.639 ± 0.039
0.272PheCys: 0.272 ± 0.009
1.911PheAsp: 1.911 ± 0.028
1.372PheGlu: 1.372 ± 0.025
0.868PhePhe: 0.868 ± 0.02
2.952PheGly: 2.952 ± 0.038
0.644PheHis: 0.644 ± 0.015
0.633PheIle: 0.633 ± 0.017
0.521PheLys: 0.521 ± 0.016
2.636PheLeu: 2.636 ± 0.037
0.4PheMet: 0.4 ± 0.014
0.542PheAsn: 0.542 ± 0.015
1.406PhePro: 1.406 ± 0.026
0.694PheGln: 0.694 ± 0.018
1.884PheArg: 1.884 ± 0.029
1.416PheSer: 1.416 ± 0.02
1.989PheThr: 1.989 ± 0.032
2.244PheVal: 2.244 ± 0.034
0.441PheTrp: 0.441 ± 0.014
0.558PheTyr: 0.558 ± 0.016
0.0PheXaa: 0.0 ± 0.0
Gly
11.073GlyAla: 11.073 ± 0.074
0.86GlyCys: 0.86 ± 0.016
5.193GlyAsp: 5.193 ± 0.056
4.917GlyGlu: 4.917 ± 0.051
2.854GlyPhe: 2.854 ± 0.036
8.753GlyGly: 8.753 ± 0.093
2.485GlyHis: 2.485 ± 0.035
3.382GlyIle: 3.382 ± 0.037
2.4GlyLys: 2.4 ± 0.037
9.491GlyLeu: 9.491 ± 0.076
1.979GlyMet: 1.979 ± 0.026
1.803GlyAsn: 1.803 ± 0.033
5.303GlyPro: 5.303 ± 0.046
2.687GlyGln: 2.687 ± 0.037
8.128GlyArg: 8.128 ± 0.06
5.389GlySer: 5.389 ± 0.054
6.576GlyThr: 6.576 ± 0.057
7.531GlyVal: 7.531 ± 0.058
1.705GlyTrp: 1.705 ± 0.027
2.315GlyTyr: 2.315 ± 0.032
0.0GlyXaa: 0.0 ± 0.0
His
2.867HisAla: 2.867 ± 0.034
0.211HisCys: 0.211 ± 0.009
1.45HisAsp: 1.45 ± 0.028
1.231HisGlu: 1.231 ± 0.021
0.668HisPhe: 0.668 ± 0.018
2.584HisGly: 2.584 ± 0.028
0.745HisHis: 0.745 ± 0.018
0.657HisIle: 0.657 ± 0.017
0.374HisLys: 0.374 ± 0.012
2.489HisLeu: 2.489 ± 0.034
0.34HisMet: 0.34 ± 0.011
0.365HisAsn: 0.365 ± 0.012
1.905HisPro: 1.905 ± 0.028
0.649HisGln: 0.649 ± 0.014
2.254HisArg: 2.254 ± 0.032
1.05HisSer: 1.05 ± 0.021
1.413HisThr: 1.413 ± 0.02
1.801HisVal: 1.801 ± 0.028
0.402HisTrp: 0.402 ± 0.012
0.497HisTyr: 0.497 ± 0.013
0.0HisXaa: 0.0 ± 0.0
Ile
4.432IleAla: 4.432 ± 0.05
0.254IleCys: 0.254 ± 0.009
2.115IleAsp: 2.115 ± 0.029
1.824IleGlu: 1.824 ± 0.03
0.614IlePhe: 0.614 ± 0.017
3.375IleGly: 3.375 ± 0.04
0.585IleHis: 0.585 ± 0.014
0.783IleIle: 0.783 ± 0.022
0.687IleLys: 0.687 ± 0.018
2.304IleLeu: 2.304 ± 0.032
0.422IleMet: 0.422 ± 0.012
0.653IleAsn: 0.653 ± 0.016
1.68IlePro: 1.68 ± 0.028
0.716IleGln: 0.716 ± 0.017
2.213IleArg: 2.213 ± 0.031
1.532IleSer: 1.532 ± 0.023
2.151IleThr: 2.151 ± 0.033
2.585IleVal: 2.585 ± 0.037
0.356IleTrp: 0.356 ± 0.013
0.502IleTyr: 0.502 ± 0.014
0.0IleXaa: 0.0 ± 0.0
Lys
2.942LysAla: 2.942 ± 0.047
0.113LysCys: 0.113 ± 0.007
1.35LysAsp: 1.35 ± 0.028
1.126LysGlu: 1.126 ± 0.023
0.449LysPhe: 0.449 ± 0.013
1.851LysGly: 1.851 ± 0.031
0.432LysHis: 0.432 ± 0.013
0.802LysIle: 0.802 ± 0.018
0.844LysLys: 0.844 ± 0.025
1.954LysLeu: 1.954 ± 0.028
0.364LysMet: 0.364 ± 0.013
0.521LysAsn: 0.521 ± 0.015
1.294LysPro: 1.294 ± 0.027
0.711LysGln: 0.711 ± 0.02
1.368LysArg: 1.368 ± 0.028
1.131LysSer: 1.131 ± 0.023
1.252LysThr: 1.252 ± 0.024
1.888LysVal: 1.888 ± 0.033
0.279LysTrp: 0.279 ± 0.011
0.483LysTyr: 0.483 ± 0.013
0.0LysXaa: 0.0 ± 0.0
Leu
15.23LeuAla: 15.23 ± 0.095
0.86LeuCys: 0.86 ± 0.019
6.596LeuAsp: 6.596 ± 0.054
4.736LeuGlu: 4.736 ± 0.047
2.597LeuPhe: 2.597 ± 0.039
9.308LeuGly: 9.308 ± 0.073
2.425LeuHis: 2.425 ± 0.029
3.072LeuIle: 3.072 ± 0.043
2.045LeuLys: 2.045 ± 0.034
11.628LeuLeu: 11.628 ± 0.101
1.595LeuMet: 1.595 ± 0.025
1.633LeuAsn: 1.633 ± 0.026
6.542LeuPro: 6.542 ± 0.051
2.291LeuGln: 2.291 ± 0.029
8.907LeuArg: 8.907 ± 0.063
5.249LeuSer: 5.249 ± 0.04
7.078LeuThr: 7.078 ± 0.054
8.947LeuVal: 8.947 ± 0.06
1.378LeuTrp: 1.378 ± 0.026
1.928LeuTyr: 1.928 ± 0.03
0.0LeuXaa: 0.0 ± 0.0
Met
2.166MetAla: 2.166 ± 0.029
0.133MetCys: 0.133 ± 0.007
0.857MetAsp: 0.857 ± 0.016
0.711MetGlu: 0.711 ± 0.019
0.436MetPhe: 0.436 ± 0.013
1.267MetGly: 1.267 ± 0.022
0.354MetHis: 0.354 ± 0.01
0.639MetIle: 0.639 ± 0.016
0.394MetLys: 0.394 ± 0.012
1.618MetLeu: 1.618 ± 0.025
0.284MetMet: 0.284 ± 0.011
0.444MetAsn: 0.444 ± 0.013
1.099MetPro: 1.099 ± 0.021
0.437MetGln: 0.437 ± 0.014
1.409MetArg: 1.409 ± 0.023
1.305MetSer: 1.305 ± 0.023
1.566MetThr: 1.566 ± 0.026
1.241MetVal: 1.241 ± 0.022
0.212MetTrp: 0.212 ± 0.009
0.318MetTyr: 0.318 ± 0.01
0.0MetXaa: 0.0 ± 0.0
Asn
2.172AsnAla: 2.172 ± 0.032
0.159AsnCys: 0.159 ± 0.008
0.976AsnAsp: 0.976 ± 0.019
0.761AsnGlu: 0.761 ± 0.015
0.475AsnPhe: 0.475 ± 0.014
1.927AsnGly: 1.927 ± 0.037
0.412AsnHis: 0.412 ± 0.013
0.606AsnIle: 0.606 ± 0.016
0.416AsnLys: 0.416 ± 0.014
1.602AsnLeu: 1.602 ± 0.025
0.278AsnMet: 0.278 ± 0.009
0.429AsnAsn: 0.429 ± 0.015
1.329AsnPro: 1.329 ± 0.022
0.538AsnGln: 0.538 ± 0.015
1.233AsnArg: 1.233 ± 0.023
0.93AsnSer: 0.93 ± 0.019
1.103AsnThr: 1.103 ± 0.024
1.382AsnVal: 1.382 ± 0.026
0.295AsnTrp: 0.295 ± 0.01
0.41AsnTyr: 0.41 ± 0.013
0.0AsnXaa: 0.0 ± 0.0
Pro
8.902ProAla: 8.902 ± 0.085
0.369ProCys: 0.369 ± 0.011
4.456ProAsp: 4.456 ± 0.047
4.297ProGlu: 4.297 ± 0.05
1.502ProPhe: 1.502 ± 0.024
6.762ProGly: 6.762 ± 0.061
1.452ProHis: 1.452 ± 0.025
1.1ProIle: 1.1 ± 0.021
1.136ProLys: 1.136 ± 0.023
5.482ProLeu: 5.482 ± 0.05
0.979ProMet: 0.979 ± 0.021
0.864ProAsn: 0.864 ± 0.017
3.682ProPro: 3.682 ± 0.061
1.75ProGln: 1.75 ± 0.032
4.097ProArg: 4.097 ± 0.041
3.192ProSer: 3.192 ± 0.04
3.173ProThr: 3.173 ± 0.035
5.656ProVal: 5.656 ± 0.05
0.943ProTrp: 0.943 ± 0.021
1.442ProTyr: 1.442 ± 0.028
0.0ProXaa: 0.0 ± 0.0
Gln
3.841GlnAla: 3.841 ± 0.049
0.184GlnCys: 0.184 ± 0.008
1.463GlnAsp: 1.463 ± 0.025
1.472GlnGlu: 1.472 ± 0.022
0.676GlnPhe: 0.676 ± 0.016
2.32GlnGly: 2.32 ± 0.03
0.683GlnHis: 0.683 ± 0.018
1.02GlnIle: 1.02 ± 0.021
0.65GlnLys: 0.65 ± 0.019
2.975GlnLeu: 2.975 ± 0.037
0.464GlnMet: 0.464 ± 0.013
0.501GlnAsn: 0.501 ± 0.017
1.691GlnPro: 1.691 ± 0.03
1.259GlnGln: 1.259 ± 0.03
2.355GlnArg: 2.355 ± 0.033
1.291GlnSer: 1.291 ± 0.026
1.374GlnThr: 1.374 ± 0.024
2.383GlnVal: 2.383 ± 0.035
0.494GlnTrp: 0.494 ± 0.014
0.62GlnTyr: 0.62 ± 0.016
0.0GlnXaa: 0.0 ± 0.0
Arg
10.094ArgAla: 10.094 ± 0.078
0.623ArgCys: 0.623 ± 0.016
4.27ArgAsp: 4.27 ± 0.045
4.813ArgGlu: 4.813 ± 0.05
2.375ArgPhe: 2.375 ± 0.029
5.952ArgGly: 5.952 ± 0.051
2.256ArgHis: 2.256 ± 0.028
3.193ArgIle: 3.193 ± 0.039
1.61ArgLys: 1.61 ± 0.028
9.26ArgLeu: 9.26 ± 0.067
1.752ArgMet: 1.752 ± 0.025
1.311ArgAsn: 1.311 ± 0.018
5.151ArgPro: 5.151 ± 0.053
2.393ArgGln: 2.393 ± 0.033
8.054ArgArg: 8.054 ± 0.067
4.034ArgSer: 4.034 ± 0.042
5.593ArgThr: 5.593 ± 0.046
5.998ArgVal: 5.998 ± 0.053
1.39ArgTrp: 1.39 ± 0.026
1.835ArgTyr: 1.835 ± 0.028
0.0ArgXaa: 0.0 ± 0.0
Ser
6.666SerAla: 6.666 ± 0.054
0.421SerCys: 0.421 ± 0.013
2.646SerAsp: 2.646 ± 0.033
2.251SerGlu: 2.251 ± 0.032
1.513SerPhe: 1.513 ± 0.026
5.975SerGly: 5.975 ± 0.054
1.071SerHis: 1.071 ± 0.021
1.345SerIle: 1.345 ± 0.026
1.05SerLys: 1.05 ± 0.022
4.814SerLeu: 4.814 ± 0.05
1.06SerMet: 1.06 ± 0.02
0.869SerAsn: 0.869 ± 0.018
3.161SerPro: 3.161 ± 0.038
1.213SerGln: 1.213 ± 0.023
3.668SerArg: 3.668 ± 0.038
2.903SerSer: 2.903 ± 0.048
3.04SerThr: 3.04 ± 0.035
4.228SerVal: 4.228 ± 0.039
0.935SerTrp: 0.935 ± 0.022
1.242SerTyr: 1.242 ± 0.023
0.0SerXaa: 0.0 ± 0.0
Thr
9.307ThrAla: 9.307 ± 0.065
0.462ThrCys: 0.462 ± 0.013
3.719ThrAsp: 3.719 ± 0.039
3.255ThrGlu: 3.255 ± 0.034
1.617ThrPhe: 1.617 ± 0.025
7.07ThrGly: 7.07 ± 0.054
1.252ThrHis: 1.252 ± 0.024
1.574ThrIle: 1.574 ± 0.023
1.14ThrLys: 1.14 ± 0.025
5.755ThrLeu: 5.755 ± 0.045
0.91ThrMet: 0.91 ± 0.019
1.023ThrAsn: 1.023 ± 0.023
4.123ThrPro: 4.123 ± 0.045
1.351ThrGln: 1.351 ± 0.025
4.033ThrArg: 4.033 ± 0.041
3.183ThrSer: 3.183 ± 0.042
3.874ThrThr: 3.874 ± 0.053
6.255ThrVal: 6.255 ± 0.053
0.93ThrTrp: 0.93 ± 0.019
1.404ThrTyr: 1.404 ± 0.025
0.0ThrXaa: 0.0 ± 0.0
Val
10.687ValAla: 10.687 ± 0.076
0.775ValCys: 0.775 ± 0.016
4.935ValAsp: 4.935 ± 0.045
4.614ValGlu: 4.614 ± 0.047
2.444ValPhe: 2.444 ± 0.028
6.46ValGly: 6.46 ± 0.056
2.056ValHis: 2.056 ± 0.026
2.764ValIle: 2.764 ± 0.036
1.729ValLys: 1.729 ± 0.031
9.645ValLeu: 9.645 ± 0.07
1.415ValMet: 1.415 ± 0.025
1.687ValAsn: 1.687 ± 0.03
5.487ValPro: 5.487 ± 0.051
2.101ValGln: 2.101 ± 0.031
7.391ValArg: 7.391 ± 0.055
4.316ValSer: 4.316 ± 0.038
5.946ValThr: 5.946 ± 0.048
8.029ValVal: 8.029 ± 0.067
1.192ValTrp: 1.192 ± 0.021
1.64ValTyr: 1.64 ± 0.024
0.0ValXaa: 0.0 ± 0.0
Trp
1.732TrpAla: 1.732 ± 0.027
0.161TrpCys: 0.161 ± 0.008
0.87TrpAsp: 0.87 ± 0.022
0.717TrpGlu: 0.717 ± 0.017
0.5TrpPhe: 0.5 ± 0.015
1.084TrpGly: 1.084 ± 0.017
0.391TrpHis: 0.391 ± 0.013
0.551TrpIle: 0.551 ± 0.016
0.377TrpLys: 0.377 ± 0.014
1.85TrpLeu: 1.85 ± 0.028
0.284TrpMet: 0.284 ± 0.011
0.437TrpAsn: 0.437 ± 0.014
0.81TrpPro: 0.81 ± 0.018
0.648TrpGln: 0.648 ± 0.017
1.366TrpArg: 1.366 ± 0.023
0.964TrpSer: 0.964 ± 0.021
1.1TrpThr: 1.1 ± 0.024
0.968TrpVal: 0.968 ± 0.02
0.352TrpTrp: 0.352 ± 0.013
0.397TrpTyr: 0.397 ± 0.015
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.847TyrAla: 2.847 ± 0.036
0.181TyrCys: 0.181 ± 0.008
1.634TyrAsp: 1.634 ± 0.032
1.293TyrGlu: 1.293 ± 0.024
0.635TyrPhe: 0.635 ± 0.015
2.314TyrGly: 2.314 ± 0.031
0.404TyrHis: 0.404 ± 0.013
0.477TyrIle: 0.477 ± 0.014
0.409TyrLys: 0.409 ± 0.013
2.083TyrLeu: 2.083 ± 0.034
0.239TyrMet: 0.239 ± 0.011
0.425TyrAsn: 0.425 ± 0.013
1.059TyrPro: 1.059 ± 0.022
0.614TyrGln: 0.614 ± 0.016
1.876TyrArg: 1.876 ± 0.028
0.982TyrSer: 0.982 ± 0.021
1.251TyrThr: 1.251 ± 0.022
1.721TyrVal: 1.721 ± 0.022
0.374TyrTrp: 0.374 ± 0.012
0.477TyrTyr: 0.477 ± 0.014
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 8312 proteins (2717867 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