Amino acid dipepetide frequency for Streptomyces sp. SID625

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
21.996AlaAla: 21.996 ± 0.138
1.132AlaCys: 1.132 ± 0.025
8.558AlaAsp: 8.558 ± 0.068
8.733AlaGlu: 8.733 ± 0.08
3.489AlaPhe: 3.489 ± 0.038
13.503AlaGly: 13.503 ± 0.091
3.194AlaHis: 3.194 ± 0.042
3.017AlaIle: 3.017 ± 0.044
2.689AlaLys: 2.689 ± 0.049
15.067AlaLeu: 15.067 ± 0.106
2.425AlaMet: 2.425 ± 0.04
1.755AlaAsn: 1.755 ± 0.028
7.299AlaPro: 7.299 ± 0.06
3.922AlaGln: 3.922 ± 0.046
10.99AlaArg: 10.99 ± 0.076
5.749AlaSer: 5.749 ± 0.051
6.891AlaThr: 6.891 ± 0.066
12.636AlaVal: 12.636 ± 0.082
1.847AlaTrp: 1.847 ± 0.029
2.826AlaTyr: 2.826 ± 0.037
0.0AlaXaa: 0.0 ± 0.0
Cys
1.196CysAla: 1.196 ± 0.024
0.101CysCys: 0.101 ± 0.008
0.512CysAsp: 0.512 ± 0.019
0.406CysGlu: 0.406 ± 0.012
0.228CysPhe: 0.228 ± 0.009
0.981CysGly: 0.981 ± 0.021
0.222CysHis: 0.222 ± 0.01
0.143CysIle: 0.143 ± 0.008
0.114CysLys: 0.114 ± 0.006
0.805CysLeu: 0.805 ± 0.019
0.126CysMet: 0.126 ± 0.008
0.144CysAsn: 0.144 ± 0.007
0.533CysPro: 0.533 ± 0.016
0.176CysGln: 0.176 ± 0.008
0.661CysArg: 0.661 ± 0.018
0.447CysSer: 0.447 ± 0.015
0.528CysThr: 0.528 ± 0.016
0.711CysVal: 0.711 ± 0.021
0.123CysTrp: 0.123 ± 0.007
0.151CysTyr: 0.151 ± 0.009
0.0CysXaa: 0.0 ± 0.0
Asp
7.922AspAla: 7.922 ± 0.069
0.466AspCys: 0.466 ± 0.015
3.546AspAsp: 3.546 ± 0.043
3.772AspGlu: 3.772 ± 0.052
1.678AspPhe: 1.678 ± 0.026
6.524AspGly: 6.524 ± 0.064
1.479AspHis: 1.479 ± 0.028
1.854AspIle: 1.854 ± 0.028
1.17AspLys: 1.17 ± 0.027
6.271AspLeu: 6.271 ± 0.063
0.794AspMet: 0.794 ± 0.018
0.933AspAsn: 0.933 ± 0.022
4.539AspPro: 4.539 ± 0.05
1.521AspGln: 1.521 ± 0.027
5.179AspArg: 5.179 ± 0.057
2.456AspSer: 2.456 ± 0.034
3.418AspThr: 3.418 ± 0.042
4.709AspVal: 4.709 ± 0.052
1.043AspTrp: 1.043 ± 0.023
1.095AspTyr: 1.095 ± 0.023
0.0AspXaa: 0.0 ± 0.0
Glu
7.204GluAla: 7.204 ± 0.078
0.353GluCys: 0.353 ± 0.011
2.895GluAsp: 2.895 ± 0.039
3.546GluGlu: 3.546 ± 0.051
1.426GluPhe: 1.426 ± 0.026
4.219GluGly: 4.219 ± 0.048
1.629GluHis: 1.629 ± 0.027
2.167GluIle: 2.167 ± 0.034
1.367GluLys: 1.367 ± 0.027
6.648GluLeu: 6.648 ± 0.057
0.887GluMet: 0.887 ± 0.021
1.024GluAsn: 1.024 ± 0.02
3.289GluPro: 3.289 ± 0.044
2.279GluGln: 2.279 ± 0.034
5.618GluArg: 5.618 ± 0.055
2.359GluSer: 2.359 ± 0.037
2.879GluThr: 2.879 ± 0.034
4.327GluVal: 4.327 ± 0.048
0.714GluTrp: 0.714 ± 0.018
1.07GluTyr: 1.07 ± 0.022
0.0GluXaa: 0.0 ± 0.0
Phe
3.67PheAla: 3.67 ± 0.042
0.275PheCys: 0.275 ± 0.011
1.923PheAsp: 1.923 ± 0.033
1.355PheGlu: 1.355 ± 0.023
0.879PhePhe: 0.879 ± 0.022
2.896PheGly: 2.896 ± 0.039
0.654PheHis: 0.654 ± 0.017
0.615PheIle: 0.615 ± 0.019
0.511PheLys: 0.511 ± 0.016
2.649PheLeu: 2.649 ± 0.036
0.374PheMet: 0.374 ± 0.013
0.519PheAsn: 0.519 ± 0.013
1.409PhePro: 1.409 ± 0.024
0.633PheGln: 0.633 ± 0.018
1.872PheArg: 1.872 ± 0.03
1.457PheSer: 1.457 ± 0.031
2.031PheThr: 2.031 ± 0.036
2.275PheVal: 2.275 ± 0.032
0.41PheTrp: 0.41 ± 0.014
0.573PheTyr: 0.573 ± 0.017
0.0PheXaa: 0.0 ± 0.0
Gly
11.572GlyAla: 11.572 ± 0.077
0.852GlyCys: 0.852 ± 0.024
5.301GlyAsp: 5.301 ± 0.05
4.993GlyGlu: 4.993 ± 0.055
2.861GlyPhe: 2.861 ± 0.041
8.886GlyGly: 8.886 ± 0.093
2.563GlyHis: 2.563 ± 0.039
3.265GlyIle: 3.265 ± 0.04
2.33GlyLys: 2.33 ± 0.04
9.432GlyLeu: 9.432 ± 0.077
1.88GlyMet: 1.88 ± 0.027
1.658GlyAsn: 1.658 ± 0.026
5.339GlyPro: 5.339 ± 0.051
2.688GlyGln: 2.688 ± 0.034
8.122GlyArg: 8.122 ± 0.07
5.284GlySer: 5.284 ± 0.057
6.83GlyThr: 6.83 ± 0.063
7.541GlyVal: 7.541 ± 0.065
1.662GlyTrp: 1.662 ± 0.03
2.307GlyTyr: 2.307 ± 0.036
0.0GlyXaa: 0.0 ± 0.0
His
2.796HisAla: 2.796 ± 0.037
0.242HisCys: 0.242 ± 0.01
1.422HisAsp: 1.422 ± 0.026
1.296HisGlu: 1.296 ± 0.026
0.671HisPhe: 0.671 ± 0.018
2.629HisGly: 2.629 ± 0.033
0.728HisHis: 0.728 ± 0.019
0.673HisIle: 0.673 ± 0.016
0.349HisLys: 0.349 ± 0.014
2.58HisLeu: 2.58 ± 0.037
0.317HisMet: 0.317 ± 0.012
0.375HisAsn: 0.375 ± 0.014
1.9HisPro: 1.9 ± 0.027
0.659HisGln: 0.659 ± 0.017
2.346HisArg: 2.346 ± 0.034
1.065HisSer: 1.065 ± 0.02
1.484HisThr: 1.484 ± 0.03
1.759HisVal: 1.759 ± 0.029
0.408HisTrp: 0.408 ± 0.014
0.492HisTyr: 0.492 ± 0.015
0.0HisXaa: 0.0 ± 0.0
Ile
4.39IleAla: 4.39 ± 0.047
0.289IleCys: 0.289 ± 0.012
2.098IleAsp: 2.098 ± 0.036
1.836IleGlu: 1.836 ± 0.032
0.585IlePhe: 0.585 ± 0.017
3.412IleGly: 3.412 ± 0.041
0.583IleHis: 0.583 ± 0.016
0.743IleIle: 0.743 ± 0.021
0.7IleLys: 0.7 ± 0.021
2.232IleLeu: 2.232 ± 0.036
0.415IleMet: 0.415 ± 0.014
0.623IleAsn: 0.623 ± 0.018
1.548IlePro: 1.548 ± 0.026
0.667IleGln: 0.667 ± 0.019
2.123IleArg: 2.123 ± 0.035
1.543IleSer: 1.543 ± 0.025
2.043IleThr: 2.043 ± 0.031
2.586IleVal: 2.586 ± 0.037
0.359IleTrp: 0.359 ± 0.013
0.485IleTyr: 0.485 ± 0.016
0.0IleXaa: 0.0 ± 0.0
Lys
2.777LysAla: 2.777 ± 0.044
0.124LysCys: 0.124 ± 0.007
1.375LysAsp: 1.375 ± 0.03
1.165LysGlu: 1.165 ± 0.026
0.439LysPhe: 0.439 ± 0.016
1.783LysGly: 1.783 ± 0.032
0.406LysHis: 0.406 ± 0.012
0.817LysIle: 0.817 ± 0.022
0.836LysLys: 0.836 ± 0.03
1.883LysLeu: 1.883 ± 0.033
0.337LysMet: 0.337 ± 0.012
0.549LysAsn: 0.549 ± 0.018
1.201LysPro: 1.201 ± 0.026
0.704LysGln: 0.704 ± 0.022
1.389LysArg: 1.389 ± 0.027
1.104LysSer: 1.104 ± 0.026
1.252LysThr: 1.252 ± 0.028
1.81LysVal: 1.81 ± 0.032
0.262LysTrp: 0.262 ± 0.013
0.458LysTyr: 0.458 ± 0.018
0.0LysXaa: 0.0 ± 0.0
Leu
15.418LeuAla: 15.418 ± 0.108
0.903LeuCys: 0.903 ± 0.02
6.905LeuAsp: 6.905 ± 0.062
4.71LeuGlu: 4.71 ± 0.053
2.624LeuPhe: 2.624 ± 0.034
9.333LeuGly: 9.333 ± 0.071
2.423LeuHis: 2.423 ± 0.04
3.029LeuIle: 3.029 ± 0.04
2.015LeuLys: 2.015 ± 0.033
11.525LeuLeu: 11.525 ± 0.092
1.642LeuMet: 1.642 ± 0.032
1.601LeuAsn: 1.601 ± 0.026
6.571LeuPro: 6.571 ± 0.058
2.12LeuGln: 2.12 ± 0.033
9.042LeuArg: 9.042 ± 0.07
5.224LeuSer: 5.224 ± 0.054
7.029LeuThr: 7.029 ± 0.059
8.933LeuVal: 8.933 ± 0.074
1.345LeuTrp: 1.345 ± 0.027
1.936LeuTyr: 1.936 ± 0.029
0.0LeuXaa: 0.0 ± 0.0
Met
2.171MetAla: 2.171 ± 0.03
0.139MetCys: 0.139 ± 0.008
0.869MetAsp: 0.869 ± 0.018
0.717MetGlu: 0.717 ± 0.019
0.424MetPhe: 0.424 ± 0.013
1.273MetGly: 1.273 ± 0.025
0.334MetHis: 0.334 ± 0.013
0.62MetIle: 0.62 ± 0.015
0.407MetLys: 0.407 ± 0.014
1.568MetLeu: 1.568 ± 0.028
0.283MetMet: 0.283 ± 0.012
0.41MetAsn: 0.41 ± 0.013
1.092MetPro: 1.092 ± 0.025
0.434MetGln: 0.434 ± 0.015
1.37MetArg: 1.37 ± 0.024
1.274MetSer: 1.274 ± 0.024
1.478MetThr: 1.478 ± 0.023
1.191MetVal: 1.191 ± 0.025
0.208MetTrp: 0.208 ± 0.01
0.324MetTyr: 0.324 ± 0.011
0.0MetXaa: 0.0 ± 0.0
Asn
2.116AsnAla: 2.116 ± 0.033
0.168AsnCys: 0.168 ± 0.009
0.866AsnAsp: 0.866 ± 0.02
0.754AsnGlu: 0.754 ± 0.019
0.446AsnPhe: 0.446 ± 0.013
1.761AsnGly: 1.761 ± 0.032
0.372AsnHis: 0.372 ± 0.014
0.614AsnIle: 0.614 ± 0.02
0.394AsnLys: 0.394 ± 0.013
1.572AsnLeu: 1.572 ± 0.026
0.278AsnMet: 0.278 ± 0.013
0.379AsnAsn: 0.379 ± 0.014
1.227AsnPro: 1.227 ± 0.026
0.505AsnGln: 0.505 ± 0.016
1.228AsnArg: 1.228 ± 0.021
0.868AsnSer: 0.868 ± 0.02
1.123AsnThr: 1.123 ± 0.024
1.302AsnVal: 1.302 ± 0.024
0.268AsnTrp: 0.268 ± 0.011
0.407AsnTyr: 0.407 ± 0.013
0.0AsnXaa: 0.0 ± 0.0
Pro
8.917ProAla: 8.917 ± 0.074
0.384ProCys: 0.384 ± 0.013
4.579ProAsp: 4.579 ± 0.05
4.282ProGlu: 4.282 ± 0.046
1.508ProPhe: 1.508 ± 0.025
6.832ProGly: 6.832 ± 0.066
1.438ProHis: 1.438 ± 0.026
1.073ProIle: 1.073 ± 0.021
1.058ProLys: 1.058 ± 0.025
5.559ProLeu: 5.559 ± 0.055
0.942ProMet: 0.942 ± 0.024
0.809ProAsn: 0.809 ± 0.019
3.417ProPro: 3.417 ± 0.057
1.706ProGln: 1.706 ± 0.037
4.288ProArg: 4.288 ± 0.05
3.017ProSer: 3.017 ± 0.037
2.869ProThr: 2.869 ± 0.037
5.6ProVal: 5.6 ± 0.05
0.887ProTrp: 0.887 ± 0.02
1.466ProTyr: 1.466 ± 0.033
0.0ProXaa: 0.0 ± 0.0
Gln
3.723GlnAla: 3.723 ± 0.041
0.181GlnCys: 0.181 ± 0.009
1.477GlnAsp: 1.477 ± 0.026
1.474GlnGlu: 1.474 ± 0.027
0.668GlnPhe: 0.668 ± 0.019
2.369GlnGly: 2.369 ± 0.033
0.712GlnHis: 0.712 ± 0.018
1.077GlnIle: 1.077 ± 0.023
0.648GlnLys: 0.648 ± 0.02
2.91GlnLeu: 2.91 ± 0.036
0.46GlnMet: 0.46 ± 0.013
0.492GlnAsn: 0.492 ± 0.017
1.606GlnPro: 1.606 ± 0.031
1.26GlnGln: 1.26 ± 0.031
2.358GlnArg: 2.358 ± 0.034
1.244GlnSer: 1.244 ± 0.027
1.382GlnThr: 1.382 ± 0.025
2.445GlnVal: 2.445 ± 0.03
0.464GlnTrp: 0.464 ± 0.015
0.607GlnTyr: 0.607 ± 0.018
0.0GlnXaa: 0.0 ± 0.0
Arg
10.523ArgAla: 10.523 ± 0.08
0.67ArgCys: 0.67 ± 0.015
4.446ArgAsp: 4.446 ± 0.05
4.872ArgGlu: 4.872 ± 0.05
2.406ArgPhe: 2.406 ± 0.036
6.036ArgGly: 6.036 ± 0.061
2.292ArgHis: 2.292 ± 0.032
3.225ArgIle: 3.225 ± 0.037
1.568ArgLys: 1.568 ± 0.028
9.416ArgLeu: 9.416 ± 0.08
1.642ArgMet: 1.642 ± 0.029
1.277ArgAsn: 1.277 ± 0.022
5.254ArgPro: 5.254 ± 0.06
2.397ArgGln: 2.397 ± 0.036
8.068ArgArg: 8.068 ± 0.084
4.042ArgSer: 4.042 ± 0.044
5.817ArgThr: 5.817 ± 0.05
6.111ArgVal: 6.111 ± 0.053
1.412ArgTrp: 1.412 ± 0.027
1.843ArgTyr: 1.843 ± 0.03
0.0ArgXaa: 0.0 ± 0.0
Ser
6.741SerAla: 6.741 ± 0.063
0.408SerCys: 0.408 ± 0.013
2.546SerAsp: 2.546 ± 0.035
2.216SerGlu: 2.216 ± 0.032
1.517SerPhe: 1.517 ± 0.027
5.962SerGly: 5.962 ± 0.061
1.015SerHis: 1.015 ± 0.022
1.268SerIle: 1.268 ± 0.024
0.959SerLys: 0.959 ± 0.024
4.782SerLeu: 4.782 ± 0.051
0.97SerMet: 0.97 ± 0.02
0.785SerAsn: 0.785 ± 0.017
3.065SerPro: 3.065 ± 0.041
1.224SerGln: 1.224 ± 0.024
3.644SerArg: 3.644 ± 0.042
2.743SerSer: 2.743 ± 0.049
2.898SerThr: 2.898 ± 0.041
4.253SerVal: 4.253 ± 0.04
0.889SerTrp: 0.889 ± 0.022
1.231SerTyr: 1.231 ± 0.026
0.0SerXaa: 0.0 ± 0.0
Thr
9.369ThrAla: 9.369 ± 0.071
0.456ThrCys: 0.456 ± 0.015
3.692ThrAsp: 3.692 ± 0.041
3.274ThrGlu: 3.274 ± 0.037
1.554ThrPhe: 1.554 ± 0.028
7.29ThrGly: 7.29 ± 0.066
1.231ThrHis: 1.231 ± 0.026
1.458ThrIle: 1.458 ± 0.024
1.087ThrLys: 1.087 ± 0.027
5.747ThrLeu: 5.747 ± 0.051
0.922ThrMet: 0.922 ± 0.019
0.934ThrAsn: 0.934 ± 0.021
4.01ThrPro: 4.01 ± 0.048
1.319ThrGln: 1.319 ± 0.025
4.101ThrArg: 4.101 ± 0.045
2.991ThrSer: 2.991 ± 0.043
3.788ThrThr: 3.788 ± 0.057
6.292ThrVal: 6.292 ± 0.064
0.911ThrTrp: 0.911 ± 0.019
1.399ThrTyr: 1.399 ± 0.029
0.0ThrXaa: 0.0 ± 0.0
Val
10.735ValAla: 10.735 ± 0.086
0.807ValCys: 0.807 ± 0.019
4.966ValAsp: 4.966 ± 0.047
4.514ValGlu: 4.514 ± 0.052
2.431ValPhe: 2.431 ± 0.04
6.303ValGly: 6.303 ± 0.061
2.089ValHis: 2.089 ± 0.028
2.636ValIle: 2.636 ± 0.036
1.678ValLys: 1.678 ± 0.029
9.844ValLeu: 9.844 ± 0.073
1.387ValMet: 1.387 ± 0.028
1.582ValAsn: 1.582 ± 0.028
5.486ValPro: 5.486 ± 0.059
2.066ValGln: 2.066 ± 0.03
7.713ValArg: 7.713 ± 0.062
4.353ValSer: 4.353 ± 0.042
5.774ValThr: 5.774 ± 0.058
7.892ValVal: 7.892 ± 0.072
1.136ValTrp: 1.136 ± 0.022
1.638ValTyr: 1.638 ± 0.028
0.0ValXaa: 0.0 ± 0.0
Trp
1.663TrpAla: 1.663 ± 0.028
0.171TrpCys: 0.171 ± 0.008
0.864TrpAsp: 0.864 ± 0.021
0.687TrpGlu: 0.687 ± 0.018
0.498TrpPhe: 0.498 ± 0.015
1.049TrpGly: 1.049 ± 0.022
0.415TrpHis: 0.415 ± 0.014
0.506TrpIle: 0.506 ± 0.015
0.386TrpLys: 0.386 ± 0.014
1.731TrpLeu: 1.731 ± 0.034
0.257TrpMet: 0.257 ± 0.011
0.401TrpAsn: 0.401 ± 0.015
0.785TrpPro: 0.785 ± 0.019
0.636TrpGln: 0.636 ± 0.016
1.344TrpArg: 1.344 ± 0.026
0.925TrpSer: 0.925 ± 0.021
1.061TrpThr: 1.061 ± 0.023
0.953TrpVal: 0.953 ± 0.022
0.325TrpTrp: 0.325 ± 0.013
0.379TrpTyr: 0.379 ± 0.014
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.82TyrAla: 2.82 ± 0.041
0.187TyrCys: 0.187 ± 0.009
1.529TyrAsp: 1.529 ± 0.03
1.3TyrGlu: 1.3 ± 0.025
0.651TyrPhe: 0.651 ± 0.014
2.322TyrGly: 2.322 ± 0.036
0.413TyrHis: 0.413 ± 0.013
0.461TyrIle: 0.461 ± 0.014
0.405TyrLys: 0.405 ± 0.014
2.105TyrLeu: 2.105 ± 0.035
0.245TyrMet: 0.245 ± 0.01
0.402TyrAsn: 0.402 ± 0.014
1.063TyrPro: 1.063 ± 0.02
0.641TyrGln: 0.641 ± 0.018
1.86TyrArg: 1.86 ± 0.03
0.969TyrSer: 0.969 ± 0.025
1.25TyrThr: 1.25 ± 0.027
1.702TyrVal: 1.702 ± 0.026
0.364TyrTrp: 0.364 ± 0.012
0.466TyrTyr: 0.466 ± 0.016
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 9651 proteins (2221653 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