Amino acid dipepetide frequency for Streptomyces sp. NRRL F-5122

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
20.249AlaAla: 20.249 ± 0.156
1.022AlaCys: 1.022 ± 0.02
7.949AlaAsp: 7.949 ± 0.062
8.227AlaGlu: 8.227 ± 0.075
3.54AlaPhe: 3.54 ± 0.041
12.414AlaGly: 12.414 ± 0.075
2.978AlaHis: 2.978 ± 0.035
3.588AlaIle: 3.588 ± 0.041
2.785AlaLys: 2.785 ± 0.039
14.199AlaLeu: 14.199 ± 0.097
2.496AlaMet: 2.496 ± 0.031
1.947AlaAsn: 1.947 ± 0.034
6.659AlaPro: 6.659 ± 0.059
3.953AlaGln: 3.953 ± 0.041
10.158AlaArg: 10.158 ± 0.076
6.135AlaSer: 6.135 ± 0.046
7.005AlaThr: 7.005 ± 0.055
12.205AlaVal: 12.205 ± 0.087
1.851AlaTrp: 1.851 ± 0.027
2.753AlaTyr: 2.753 ± 0.03
0.0AlaXaa: 0.0 ± 0.0
Cys
1.03CysAla: 1.03 ± 0.019
0.101CysCys: 0.101 ± 0.008
0.477CysAsp: 0.477 ± 0.014
0.398CysGlu: 0.398 ± 0.012
0.208CysPhe: 0.208 ± 0.009
0.905CysGly: 0.905 ± 0.017
0.198CysHis: 0.198 ± 0.009
0.194CysIle: 0.194 ± 0.008
0.102CysLys: 0.102 ± 0.006
0.755CysLeu: 0.755 ± 0.018
0.119CysMet: 0.119 ± 0.007
0.134CysAsn: 0.134 ± 0.007
0.463CysPro: 0.463 ± 0.015
0.164CysGln: 0.164 ± 0.008
0.609CysArg: 0.609 ± 0.015
0.445CysSer: 0.445 ± 0.014
0.543CysThr: 0.543 ± 0.018
0.649CysVal: 0.649 ± 0.015
0.128CysTrp: 0.128 ± 0.007
0.15CysTyr: 0.15 ± 0.007
0.0CysXaa: 0.0 ± 0.0
Asp
7.292AspAla: 7.292 ± 0.066
0.408AspCys: 0.408 ± 0.012
3.492AspAsp: 3.492 ± 0.032
3.802AspGlu: 3.802 ± 0.041
1.655AspPhe: 1.655 ± 0.032
6.275AspGly: 6.275 ± 0.05
1.515AspHis: 1.515 ± 0.026
1.957AspIle: 1.957 ± 0.027
1.234AspLys: 1.234 ± 0.029
6.261AspLeu: 6.261 ± 0.052
0.886AspMet: 0.886 ± 0.018
1.043AspAsn: 1.043 ± 0.022
4.444AspPro: 4.444 ± 0.046
1.57AspGln: 1.57 ± 0.027
4.909AspArg: 4.909 ± 0.044
2.623AspSer: 2.623 ± 0.038
3.251AspThr: 3.251 ± 0.036
4.889AspVal: 4.889 ± 0.047
1.041AspTrp: 1.041 ± 0.022
1.155AspTyr: 1.155 ± 0.022
0.0AspXaa: 0.0 ± 0.0
Glu
7.07GluAla: 7.07 ± 0.067
0.363GluCys: 0.363 ± 0.011
2.786GluAsp: 2.786 ± 0.032
3.534GluGlu: 3.534 ± 0.049
1.426GluPhe: 1.426 ± 0.023
4.319GluGly: 4.319 ± 0.046
1.569GluHis: 1.569 ± 0.026
2.2GluIle: 2.2 ± 0.032
1.345GluLys: 1.345 ± 0.025
6.635GluLeu: 6.635 ± 0.055
0.894GluMet: 0.894 ± 0.021
1.032GluAsn: 1.032 ± 0.021
3.226GluPro: 3.226 ± 0.039
2.27GluGln: 2.27 ± 0.03
5.48GluArg: 5.48 ± 0.057
2.617GluSer: 2.617 ± 0.033
2.87GluThr: 2.87 ± 0.03
4.391GluVal: 4.391 ± 0.047
0.768GluTrp: 0.768 ± 0.016
1.104GluTyr: 1.104 ± 0.02
0.0GluXaa: 0.0 ± 0.0
Phe
3.663PheAla: 3.663 ± 0.035
0.259PheCys: 0.259 ± 0.01
1.953PheAsp: 1.953 ± 0.033
1.419PheGlu: 1.419 ± 0.029
0.856PhePhe: 0.856 ± 0.022
3.039PheGly: 3.039 ± 0.044
0.627PheHis: 0.627 ± 0.016
0.752PheIle: 0.752 ± 0.02
0.521PheLys: 0.521 ± 0.016
2.636PheLeu: 2.636 ± 0.031
0.4PheMet: 0.4 ± 0.011
0.591PheAsn: 0.591 ± 0.016
1.42PhePro: 1.42 ± 0.027
0.681PheGln: 0.681 ± 0.016
1.892PheArg: 1.892 ± 0.028
1.487PheSer: 1.487 ± 0.023
2.07PheThr: 2.07 ± 0.029
2.316PheVal: 2.316 ± 0.03
0.431PheTrp: 0.431 ± 0.011
0.611PheTyr: 0.611 ± 0.015
0.0PheXaa: 0.0 ± 0.0
Gly
10.726GlyAla: 10.726 ± 0.075
0.815GlyCys: 0.815 ± 0.019
5.162GlyAsp: 5.162 ± 0.057
4.857GlyGlu: 4.857 ± 0.041
2.886GlyPhe: 2.886 ± 0.035
8.483GlyGly: 8.483 ± 0.076
2.436GlyHis: 2.436 ± 0.031
3.541GlyIle: 3.541 ± 0.046
2.391GlyLys: 2.391 ± 0.034
9.338GlyLeu: 9.338 ± 0.063
1.989GlyMet: 1.989 ± 0.028
1.813GlyAsn: 1.813 ± 0.032
4.97GlyPro: 4.97 ± 0.05
2.66GlyGln: 2.66 ± 0.034
7.842GlyArg: 7.842 ± 0.066
5.55GlySer: 5.55 ± 0.054
6.382GlyThr: 6.382 ± 0.067
7.446GlyVal: 7.446 ± 0.049
1.751GlyTrp: 1.751 ± 0.033
2.278GlyTyr: 2.278 ± 0.035
0.0GlyXaa: 0.0 ± 0.0
His
2.736HisAla: 2.736 ± 0.033
0.204HisCys: 0.204 ± 0.009
1.459HisAsp: 1.459 ± 0.027
1.295HisGlu: 1.295 ± 0.023
0.709HisPhe: 0.709 ± 0.016
2.605HisGly: 2.605 ± 0.034
0.757HisHis: 0.757 ± 0.021
0.766HisIle: 0.766 ± 0.018
0.379HisLys: 0.379 ± 0.013
2.502HisLeu: 2.502 ± 0.034
0.376HisMet: 0.376 ± 0.012
0.416HisAsn: 0.416 ± 0.014
1.869HisPro: 1.869 ± 0.029
0.648HisGln: 0.648 ± 0.015
2.234HisArg: 2.234 ± 0.031
1.078HisSer: 1.078 ± 0.02
1.415HisThr: 1.415 ± 0.023
1.821HisVal: 1.821 ± 0.027
0.42HisTrp: 0.42 ± 0.013
0.527HisTyr: 0.527 ± 0.016
0.0HisXaa: 0.0 ± 0.0
Ile
4.916IleAla: 4.916 ± 0.044
0.292IleCys: 0.292 ± 0.01
2.294IleAsp: 2.294 ± 0.031
2.005IleGlu: 2.005 ± 0.029
0.699IlePhe: 0.699 ± 0.017
3.678IleGly: 3.678 ± 0.038
0.688IleHis: 0.688 ± 0.018
0.883IleIle: 0.883 ± 0.02
0.735IleLys: 0.735 ± 0.016
2.453IleLeu: 2.453 ± 0.037
0.464IleMet: 0.464 ± 0.016
0.753IleAsn: 0.753 ± 0.018
1.816IlePro: 1.816 ± 0.03
0.759IleGln: 0.759 ± 0.016
2.379IleArg: 2.379 ± 0.034
1.766IleSer: 1.766 ± 0.026
2.326IleThr: 2.326 ± 0.029
2.922IleVal: 2.922 ± 0.04
0.404IleTrp: 0.404 ± 0.013
0.566IleTyr: 0.566 ± 0.015
0.0IleXaa: 0.0 ± 0.0
Lys
2.943LysAla: 2.943 ± 0.043
0.118LysCys: 0.118 ± 0.007
1.372LysAsp: 1.372 ± 0.027
1.163LysGlu: 1.163 ± 0.024
0.449LysPhe: 0.449 ± 0.016
1.865LysGly: 1.865 ± 0.032
0.432LysHis: 0.432 ± 0.014
0.846LysIle: 0.846 ± 0.018
0.791LysLys: 0.791 ± 0.025
1.942LysLeu: 1.942 ± 0.034
0.372LysMet: 0.372 ± 0.011
0.554LysAsn: 0.554 ± 0.017
1.331LysPro: 1.331 ± 0.027
0.741LysGln: 0.741 ± 0.018
1.405LysArg: 1.405 ± 0.021
1.161LysSer: 1.161 ± 0.022
1.29LysThr: 1.29 ± 0.027
1.91LysVal: 1.91 ± 0.031
0.274LysTrp: 0.274 ± 0.01
0.479LysTyr: 0.479 ± 0.016
0.0LysXaa: 0.0 ± 0.0
Leu
14.638LeuAla: 14.638 ± 0.107
0.851LeuCys: 0.851 ± 0.019
6.617LeuAsp: 6.617 ± 0.051
4.954LeuGlu: 4.954 ± 0.043
2.598LeuPhe: 2.598 ± 0.034
9.082LeuGly: 9.082 ± 0.07
2.445LeuHis: 2.445 ± 0.036
3.368LeuIle: 3.368 ± 0.039
2.069LeuLys: 2.069 ± 0.036
11.22LeuLeu: 11.22 ± 0.095
1.694LeuMet: 1.694 ± 0.024
1.782LeuAsn: 1.782 ± 0.027
6.395LeuPro: 6.395 ± 0.052
2.403LeuGln: 2.403 ± 0.031
8.495LeuArg: 8.495 ± 0.063
5.459LeuSer: 5.459 ± 0.044
6.784LeuThr: 6.784 ± 0.055
8.931LeuVal: 8.931 ± 0.073
1.301LeuTrp: 1.301 ± 0.026
1.939LeuTyr: 1.939 ± 0.026
0.0LeuXaa: 0.0 ± 0.0
Met
2.289MetAla: 2.289 ± 0.028
0.131MetCys: 0.131 ± 0.007
0.934MetAsp: 0.934 ± 0.02
0.76MetGlu: 0.76 ± 0.016
0.466MetPhe: 0.466 ± 0.013
1.326MetGly: 1.326 ± 0.024
0.402MetHis: 0.402 ± 0.013
0.656MetIle: 0.656 ± 0.016
0.42MetLys: 0.42 ± 0.012
1.709MetLeu: 1.709 ± 0.027
0.306MetMet: 0.306 ± 0.011
0.453MetAsn: 0.453 ± 0.011
1.143MetPro: 1.143 ± 0.02
0.477MetGln: 0.477 ± 0.013
1.448MetArg: 1.448 ± 0.023
1.373MetSer: 1.373 ± 0.022
1.557MetThr: 1.557 ± 0.024
1.315MetVal: 1.315 ± 0.021
0.223MetTrp: 0.223 ± 0.01
0.339MetTyr: 0.339 ± 0.013
0.0MetXaa: 0.0 ± 0.0
Asn
2.295AsnAla: 2.295 ± 0.03
0.166AsnCys: 0.166 ± 0.008
1.022AsnAsp: 1.022 ± 0.021
0.84AsnGlu: 0.84 ± 0.017
0.503AsnPhe: 0.503 ± 0.015
1.965AsnGly: 1.965 ± 0.033
0.425AsnHis: 0.425 ± 0.013
0.688AsnIle: 0.688 ± 0.018
0.425AsnLys: 0.425 ± 0.015
1.705AsnLeu: 1.705 ± 0.031
0.324AsnMet: 0.324 ± 0.01
0.485AsnAsn: 0.485 ± 0.015
1.401AsnPro: 1.401 ± 0.022
0.534AsnGln: 0.534 ± 0.017
1.315AsnArg: 1.315 ± 0.023
1.014AsnSer: 1.014 ± 0.021
1.141AsnThr: 1.141 ± 0.022
1.45AsnVal: 1.45 ± 0.024
0.306AsnTrp: 0.306 ± 0.011
0.427AsnTyr: 0.427 ± 0.014
0.0AsnXaa: 0.0 ± 0.0
Pro
7.974ProAla: 7.974 ± 0.066
0.323ProCys: 0.323 ± 0.01
4.357ProAsp: 4.357 ± 0.049
4.141ProGlu: 4.141 ± 0.04
1.547ProPhe: 1.547 ± 0.025
6.428ProGly: 6.428 ± 0.061
1.452ProHis: 1.452 ± 0.027
1.367ProIle: 1.367 ± 0.025
1.157ProLys: 1.157 ± 0.024
5.308ProLeu: 5.308 ± 0.053
0.995ProMet: 0.995 ± 0.022
0.939ProAsn: 0.939 ± 0.022
3.332ProPro: 3.332 ± 0.049
1.836ProGln: 1.836 ± 0.031
3.846ProArg: 3.846 ± 0.042
3.335ProSer: 3.335 ± 0.044
3.181ProThr: 3.181 ± 0.036
5.425ProVal: 5.425 ± 0.05
0.889ProTrp: 0.889 ± 0.019
1.461ProTyr: 1.461 ± 0.027
0.0ProXaa: 0.0 ± 0.0
Gln
3.849GlnAla: 3.849 ± 0.039
0.183GlnCys: 0.183 ± 0.009
1.517GlnAsp: 1.517 ± 0.025
1.521GlnGlu: 1.521 ± 0.024
0.725GlnPhe: 0.725 ± 0.016
2.458GlnGly: 2.458 ± 0.034
0.727GlnHis: 0.727 ± 0.018
1.153GlnIle: 1.153 ± 0.021
0.657GlnLys: 0.657 ± 0.018
3.049GlnLeu: 3.049 ± 0.038
0.516GlnMet: 0.516 ± 0.015
0.543GlnAsn: 0.543 ± 0.019
1.675GlnPro: 1.675 ± 0.023
1.321GlnGln: 1.321 ± 0.032
2.385GlnArg: 2.385 ± 0.031
1.405GlnSer: 1.405 ± 0.022
1.437GlnThr: 1.437 ± 0.023
2.451GlnVal: 2.451 ± 0.033
0.474GlnTrp: 0.474 ± 0.012
0.656GlnTyr: 0.656 ± 0.016
0.0GlnXaa: 0.0 ± 0.0
Arg
9.64ArgAla: 9.64 ± 0.086
0.591ArgCys: 0.591 ± 0.017
4.224ArgAsp: 4.224 ± 0.043
4.644ArgGlu: 4.644 ± 0.042
2.388ArgPhe: 2.388 ± 0.034
5.758ArgGly: 5.758 ± 0.047
2.239ArgHis: 2.239 ± 0.034
3.425ArgIle: 3.425 ± 0.04
1.604ArgLys: 1.604 ± 0.027
8.952ArgLeu: 8.952 ± 0.064
1.761ArgMet: 1.761 ± 0.023
1.403ArgAsn: 1.403 ± 0.021
4.865ArgPro: 4.865 ± 0.054
2.352ArgGln: 2.352 ± 0.028
7.828ArgArg: 7.828 ± 0.074
4.273ArgSer: 4.273 ± 0.042
5.495ArgThr: 5.495 ± 0.045
5.889ArgVal: 5.889 ± 0.053
1.337ArgTrp: 1.337 ± 0.025
1.824ArgTyr: 1.824 ± 0.026
0.0ArgXaa: 0.0 ± 0.0
Ser
6.931SerAla: 6.931 ± 0.062
0.399SerCys: 0.399 ± 0.013
2.868SerAsp: 2.868 ± 0.036
2.482SerGlu: 2.482 ± 0.033
1.599SerPhe: 1.599 ± 0.028
6.105SerGly: 6.105 ± 0.058
1.118SerHis: 1.118 ± 0.023
1.565SerIle: 1.565 ± 0.031
1.083SerLys: 1.083 ± 0.023
5.017SerLeu: 5.017 ± 0.046
1.145SerMet: 1.145 ± 0.022
0.927SerAsn: 0.927 ± 0.019
3.22SerPro: 3.22 ± 0.038
1.364SerGln: 1.364 ± 0.024
3.796SerArg: 3.796 ± 0.036
3.09SerSer: 3.09 ± 0.046
3.284SerThr: 3.284 ± 0.04
4.508SerVal: 4.508 ± 0.041
0.928SerTrp: 0.928 ± 0.019
1.296SerTyr: 1.296 ± 0.027
0.0SerXaa: 0.0 ± 0.0
Thr
8.81ThrAla: 8.81 ± 0.066
0.455ThrCys: 0.455 ± 0.015
3.711ThrAsp: 3.711 ± 0.044
3.189ThrGlu: 3.189 ± 0.033
1.674ThrPhe: 1.674 ± 0.03
6.666ThrGly: 6.666 ± 0.055
1.278ThrHis: 1.278 ± 0.024
1.77ThrIle: 1.77 ± 0.031
1.206ThrLys: 1.206 ± 0.024
5.833ThrLeu: 5.833 ± 0.05
0.985ThrMet: 0.985 ± 0.019
1.029ThrAsn: 1.029 ± 0.022
3.978ThrPro: 3.978 ± 0.045
1.461ThrGln: 1.461 ± 0.025
4.012ThrArg: 4.012 ± 0.041
3.374ThrSer: 3.374 ± 0.044
3.963ThrThr: 3.963 ± 0.054
6.377ThrVal: 6.377 ± 0.053
0.911ThrTrp: 0.911 ± 0.019
1.397ThrTyr: 1.397 ± 0.026
0.0ThrXaa: 0.0 ± 0.0
Val
10.693ValAla: 10.693 ± 0.08
0.769ValCys: 0.769 ± 0.018
5.107ValAsp: 5.107 ± 0.041
4.67ValGlu: 4.67 ± 0.048
2.484ValPhe: 2.484 ± 0.033
6.591ValGly: 6.591 ± 0.058
2.12ValHis: 2.12 ± 0.031
2.94ValIle: 2.94 ± 0.04
1.747ValLys: 1.747 ± 0.026
9.619ValLeu: 9.619 ± 0.079
1.439ValMet: 1.439 ± 0.027
1.696ValAsn: 1.696 ± 0.027
5.196ValPro: 5.196 ± 0.046
2.242ValGln: 2.242 ± 0.027
7.221ValArg: 7.221 ± 0.063
4.515ValSer: 4.515 ± 0.047
5.736ValThr: 5.736 ± 0.046
8.265ValVal: 8.265 ± 0.072
1.166ValTrp: 1.166 ± 0.023
1.638ValTyr: 1.638 ± 0.026
0.0ValXaa: 0.0 ± 0.0
Trp
1.637TrpAla: 1.637 ± 0.024
0.143TrpCys: 0.143 ± 0.008
0.831TrpAsp: 0.831 ± 0.02
0.718TrpGlu: 0.718 ± 0.019
0.53TrpPhe: 0.53 ± 0.015
1.066TrpGly: 1.066 ± 0.022
0.393TrpHis: 0.393 ± 0.012
0.592TrpIle: 0.592 ± 0.017
0.381TrpLys: 0.381 ± 0.012
1.789TrpLeu: 1.789 ± 0.031
0.3TrpMet: 0.3 ± 0.011
0.437TrpAsn: 0.437 ± 0.014
0.784TrpPro: 0.784 ± 0.017
0.623TrpGln: 0.623 ± 0.017
1.333TrpArg: 1.333 ± 0.026
0.974TrpSer: 0.974 ± 0.022
1.055TrpThr: 1.055 ± 0.023
0.988TrpVal: 0.988 ± 0.021
0.339TrpTrp: 0.339 ± 0.012
0.399TrpTyr: 0.399 ± 0.013
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.728TyrAla: 2.728 ± 0.031
0.18TyrCys: 0.18 ± 0.008
1.568TyrAsp: 1.568 ± 0.032
1.281TyrGlu: 1.281 ± 0.02
0.686TyrPhe: 0.686 ± 0.018
2.288TyrGly: 2.288 ± 0.031
0.417TyrHis: 0.417 ± 0.013
0.549TyrIle: 0.549 ± 0.015
0.403TyrLys: 0.403 ± 0.015
2.106TyrLeu: 2.106 ± 0.03
0.266TyrMet: 0.266 ± 0.01
0.454TyrAsn: 0.454 ± 0.017
1.106TyrPro: 1.106 ± 0.026
0.644TyrGln: 0.644 ± 0.017
1.906TyrArg: 1.906 ± 0.025
1.052TyrSer: 1.052 ± 0.02
1.292TyrThr: 1.292 ± 0.024
1.705TyrVal: 1.705 ± 0.023
0.369TyrTrp: 0.369 ± 0.012
0.48TyrTyr: 0.48 ± 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 8450 proteins (2650312 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