Amino acid dipepetide frequency for Bacteroides fragilis (strain ATCC 25285 / DSM 2151 / JCM 11019 / NCTC 9343)

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
5.44AlaAla: 5.44 ± 0.076
0.961AlaCys: 0.961 ± 0.026
4.113AlaAsp: 4.113 ± 0.054
4.503AlaGlu: 4.503 ± 0.069
3.112AlaPhe: 3.112 ± 0.052
5.185AlaGly: 5.185 ± 0.063
1.096AlaHis: 1.096 ± 0.028
4.714AlaIle: 4.714 ± 0.064
3.881AlaLys: 3.881 ± 0.062
6.547AlaLeu: 6.547 ± 0.083
1.881AlaMet: 1.881 ± 0.036
3.134AlaAsn: 3.134 ± 0.048
2.251AlaPro: 2.251 ± 0.039
2.524AlaGln: 2.524 ± 0.047
3.08AlaArg: 3.08 ± 0.052
4.227AlaSer: 4.227 ± 0.052
3.78AlaThr: 3.78 ± 0.054
4.787AlaVal: 4.787 ± 0.066
0.785AlaTrp: 0.785 ± 0.024
2.87AlaTyr: 2.87 ± 0.048
0.0AlaXaa: 0.0 ± 0.0
Cys
0.752CysAla: 0.752 ± 0.025
0.223CysCys: 0.223 ± 0.014
0.585CysAsp: 0.585 ± 0.02
0.674CysGlu: 0.674 ± 0.021
0.676CysPhe: 0.676 ± 0.022
0.973CysGly: 0.973 ± 0.025
0.274CysHis: 0.274 ± 0.013
0.927CysIle: 0.927 ± 0.024
0.686CysLys: 0.686 ± 0.018
1.165CysLeu: 1.165 ± 0.032
0.338CysMet: 0.338 ± 0.014
0.576CysAsn: 0.576 ± 0.019
0.539CysPro: 0.539 ± 0.02
0.357CysGln: 0.357 ± 0.016
0.66CysArg: 0.66 ± 0.023
0.805CysSer: 0.805 ± 0.027
0.67CysThr: 0.67 ± 0.023
0.716CysVal: 0.716 ± 0.021
0.156CysTrp: 0.156 ± 0.01
0.557CysTyr: 0.557 ± 0.018
0.0CysXaa: 0.0 ± 0.0
Asp
3.733AspAla: 3.733 ± 0.053
0.603AspCys: 0.603 ± 0.021
2.544AspAsp: 2.544 ± 0.043
3.64AspGlu: 3.64 ± 0.053
2.901AspPhe: 2.901 ± 0.045
4.086AspGly: 4.086 ± 0.07
0.847AspHis: 0.847 ± 0.022
4.065AspIle: 4.065 ± 0.048
3.997AspLys: 3.997 ± 0.055
4.525AspLeu: 4.525 ± 0.054
1.537AspMet: 1.537 ± 0.03
2.702AspAsn: 2.702 ± 0.045
1.896AspPro: 1.896 ± 0.037
1.321AspGln: 1.321 ± 0.031
2.598AspArg: 2.598 ± 0.042
3.127AspSer: 3.127 ± 0.053
2.799AspThr: 2.799 ± 0.049
3.408AspVal: 3.408 ± 0.051
0.867AspTrp: 0.867 ± 0.024
2.885AspTyr: 2.885 ± 0.049
0.0AspXaa: 0.0 ± 0.0
Glu
4.752GluAla: 4.752 ± 0.063
0.638GluCys: 0.638 ± 0.019
3.021GluAsp: 3.021 ± 0.046
5.104GluGlu: 5.104 ± 0.076
2.444GluPhe: 2.444 ± 0.047
4.117GluGly: 4.117 ± 0.051
1.221GluHis: 1.221 ± 0.027
4.702GluIle: 4.702 ± 0.058
5.291GluLys: 5.291 ± 0.073
6.254GluLeu: 6.254 ± 0.064
2.04GluMet: 2.04 ± 0.042
3.467GluAsn: 3.467 ± 0.049
1.703GluPro: 1.703 ± 0.033
2.597GluGln: 2.597 ± 0.047
3.3GluArg: 3.3 ± 0.053
3.23GluSer: 3.23 ± 0.054
3.321GluThr: 3.321 ± 0.05
4.322GluVal: 4.322 ± 0.066
0.83GluTrp: 0.83 ± 0.023
2.743GluTyr: 2.743 ± 0.041
0.0GluXaa: 0.0 ± 0.0
Phe
3.001PheAla: 3.001 ± 0.051
0.705PheCys: 0.705 ± 0.026
2.736PheAsp: 2.736 ± 0.044
2.442PheGlu: 2.442 ± 0.041
2.311PhePhe: 2.311 ± 0.048
3.118PheGly: 3.118 ± 0.05
0.9PheHis: 0.9 ± 0.024
3.421PheIle: 3.421 ± 0.056
2.361PheLys: 2.361 ± 0.039
4.179PheLeu: 4.179 ± 0.065
1.309PheMet: 1.309 ± 0.031
2.426PheAsn: 2.426 ± 0.042
1.807PhePro: 1.807 ± 0.041
1.25PheGln: 1.25 ± 0.028
2.38PheArg: 2.38 ± 0.043
3.565PheSer: 3.565 ± 0.043
2.819PheThr: 2.819 ± 0.047
2.92PheVal: 2.92 ± 0.049
0.609PheTrp: 0.609 ± 0.021
2.056PheTyr: 2.056 ± 0.039
0.0PheXaa: 0.0 ± 0.0
Gly
4.316GlyAla: 4.316 ± 0.066
0.891GlyCys: 0.891 ± 0.027
3.542GlyAsp: 3.542 ± 0.046
4.279GlyGlu: 4.279 ± 0.058
3.142GlyPhe: 3.142 ± 0.04
4.894GlyGly: 4.894 ± 0.078
1.234GlyHis: 1.234 ± 0.031
5.373GlyIle: 5.373 ± 0.073
5.32GlyLys: 5.32 ± 0.065
5.826GlyLeu: 5.826 ± 0.067
2.154GlyMet: 2.154 ± 0.041
3.611GlyAsn: 3.611 ± 0.054
1.36GlyPro: 1.36 ± 0.033
2.134GlyGln: 2.134 ± 0.039
2.89GlyArg: 2.89 ± 0.05
4.133GlySer: 4.133 ± 0.059
4.261GlyThr: 4.261 ± 0.059
4.81GlyVal: 4.81 ± 0.067
1.056GlyTrp: 1.056 ± 0.031
3.416GlyTyr: 3.416 ± 0.053
0.0GlyXaa: 0.0 ± 0.0
His
1.131HisAla: 1.131 ± 0.026
0.271HisCys: 0.271 ± 0.015
0.837HisAsp: 0.837 ± 0.026
0.978HisGlu: 0.978 ± 0.026
1.045HisPhe: 1.045 ± 0.028
1.157HisGly: 1.157 ± 0.029
0.437HisHis: 0.437 ± 0.018
1.4HisIle: 1.4 ± 0.031
1.02HisLys: 1.02 ± 0.026
1.782HisLeu: 1.782 ± 0.034
0.368HisMet: 0.368 ± 0.016
0.865HisAsn: 0.865 ± 0.024
1.03HisPro: 1.03 ± 0.024
0.628HisGln: 0.628 ± 0.018
0.958HisArg: 0.958 ± 0.023
1.121HisSer: 1.121 ± 0.027
1.101HisThr: 1.101 ± 0.029
1.006HisVal: 1.006 ± 0.024
0.26HisTrp: 0.26 ± 0.014
0.909HisTyr: 0.909 ± 0.023
0.0HisXaa: 0.0 ± 0.0
Ile
5.196IleAla: 5.196 ± 0.071
0.986IleCys: 0.986 ± 0.025
4.19IleAsp: 4.19 ± 0.053
4.439IleGlu: 4.439 ± 0.053
2.851IlePhe: 2.851 ± 0.054
4.854IleGly: 4.854 ± 0.061
1.388IleHis: 1.388 ± 0.031
4.676IleIle: 4.676 ± 0.07
4.01IleLys: 4.01 ± 0.058
6.274IleLeu: 6.274 ± 0.073
1.522IleMet: 1.522 ± 0.032
3.494IleAsn: 3.494 ± 0.053
3.225IlePro: 3.225 ± 0.044
2.216IleGln: 2.216 ± 0.043
3.779IleArg: 3.779 ± 0.051
4.763IleSer: 4.763 ± 0.057
4.093IleThr: 4.093 ± 0.053
4.342IleVal: 4.342 ± 0.056
0.707IleTrp: 0.707 ± 0.022
2.979IleTyr: 2.979 ± 0.046
0.0IleXaa: 0.0 ± 0.0
Lys
4.735LysAla: 4.735 ± 0.063
0.535LysCys: 0.535 ± 0.02
3.927LysAsp: 3.927 ± 0.058
5.944LysGlu: 5.944 ± 0.071
2.14LysPhe: 2.14 ± 0.04
4.52LysGly: 4.52 ± 0.061
1.172LysHis: 1.172 ± 0.026
4.231LysIle: 4.231 ± 0.054
5.129LysLys: 5.129 ± 0.07
5.446LysLeu: 5.446 ± 0.056
2.025LysMet: 2.025 ± 0.032
3.424LysAsn: 3.424 ± 0.048
2.101LysPro: 2.101 ± 0.039
2.665LysGln: 2.665 ± 0.042
3.148LysArg: 3.148 ± 0.048
3.382LysSer: 3.382 ± 0.046
3.564LysThr: 3.564 ± 0.055
4.38LysVal: 4.38 ± 0.063
0.748LysTrp: 0.748 ± 0.022
2.998LysTyr: 2.998 ± 0.048
0.0LysXaa: 0.0 ± 0.0
Leu
6.258LeuAla: 6.258 ± 0.066
1.37LeuCys: 1.37 ± 0.03
4.527LeuAsp: 4.527 ± 0.059
5.048LeuGlu: 5.048 ± 0.065
4.882LeuPhe: 4.882 ± 0.067
5.601LeuGly: 5.601 ± 0.08
1.738LeuHis: 1.738 ± 0.035
5.895LeuIle: 5.895 ± 0.082
6.47LeuLys: 6.47 ± 0.068
9.575LeuLeu: 9.575 ± 0.118
2.484LeuMet: 2.484 ± 0.039
4.796LeuAsn: 4.796 ± 0.066
4.345LeuPro: 4.345 ± 0.052
3.332LeuGln: 3.332 ± 0.052
4.287LeuArg: 4.287 ± 0.052
6.914LeuSer: 6.914 ± 0.075
5.337LeuThr: 5.337 ± 0.062
5.132LeuVal: 5.132 ± 0.056
1.019LeuTrp: 1.019 ± 0.029
3.777LeuTyr: 3.777 ± 0.055
0.0LeuXaa: 0.0 ± 0.0
Met
1.963MetAla: 1.963 ± 0.041
0.253MetCys: 0.253 ± 0.014
1.485MetAsp: 1.485 ± 0.034
1.816MetGlu: 1.816 ± 0.04
1.057MetPhe: 1.057 ± 0.028
1.834MetGly: 1.834 ± 0.039
0.433MetHis: 0.433 ± 0.017
1.741MetIle: 1.741 ± 0.032
2.69MetLys: 2.69 ± 0.046
2.452MetLeu: 2.452 ± 0.046
0.8MetMet: 0.8 ± 0.026
1.671MetAsn: 1.671 ± 0.034
1.15MetPro: 1.15 ± 0.029
1.039MetGln: 1.039 ± 0.023
1.235MetArg: 1.235 ± 0.031
1.388MetSer: 1.388 ± 0.03
1.476MetThr: 1.476 ± 0.03
1.574MetVal: 1.574 ± 0.031
0.257MetTrp: 0.257 ± 0.014
0.884MetTyr: 0.884 ± 0.024
0.0MetXaa: 0.0 ± 0.0
Asn
3.324AsnAla: 3.324 ± 0.056
0.511AsnCys: 0.511 ± 0.016
2.611AsnAsp: 2.611 ± 0.047
3.055AsnGlu: 3.055 ± 0.049
2.248AsnPhe: 2.248 ± 0.04
3.842AsnGly: 3.842 ± 0.06
0.988AsnHis: 0.988 ± 0.023
3.73AsnIle: 3.73 ± 0.052
3.235AsnLys: 3.235 ± 0.047
4.525AsnLeu: 4.525 ± 0.059
1.28AsnMet: 1.28 ± 0.032
2.548AsnAsn: 2.548 ± 0.048
2.445AsnPro: 2.445 ± 0.041
1.662AsnGln: 1.662 ± 0.031
2.624AsnArg: 2.624 ± 0.049
2.859AsnSer: 2.859 ± 0.046
2.663AsnThr: 2.663 ± 0.046
3.187AsnVal: 3.187 ± 0.046
0.653AsnTrp: 0.653 ± 0.019
2.481AsnTyr: 2.481 ± 0.047
0.0AsnXaa: 0.0 ± 0.0
Pro
2.79ProAla: 2.79 ± 0.048
0.374ProCys: 0.374 ± 0.017
2.654ProAsp: 2.654 ± 0.044
3.402ProGlu: 3.402 ± 0.049
1.916ProPhe: 1.916 ± 0.038
2.65ProGly: 2.65 ± 0.047
0.665ProHis: 0.665 ± 0.023
2.359ProIle: 2.359 ± 0.039
1.996ProLys: 1.996 ± 0.036
3.357ProLeu: 3.357 ± 0.054
0.94ProMet: 0.94 ± 0.024
1.661ProAsn: 1.661 ± 0.031
0.866ProPro: 0.866 ± 0.029
1.453ProGln: 1.453 ± 0.034
1.371ProArg: 1.371 ± 0.032
2.282ProSer: 2.282 ± 0.039
1.903ProThr: 1.903 ± 0.036
3.109ProVal: 3.109 ± 0.05
0.463ProTrp: 0.463 ± 0.018
1.714ProTyr: 1.714 ± 0.035
0.0ProXaa: 0.0 ± 0.0
Gln
2.468GlnAla: 2.468 ± 0.045
0.315GlnCys: 0.315 ± 0.015
1.557GlnAsp: 1.557 ± 0.031
2.441GlnGlu: 2.441 ± 0.037
1.303GlnPhe: 1.303 ± 0.034
2.067GlnGly: 2.067 ± 0.035
0.587GlnHis: 0.587 ± 0.02
2.388GlnIle: 2.388 ± 0.036
2.538GlnLys: 2.538 ± 0.041
3.289GlnLeu: 3.289 ± 0.048
1.025GlnMet: 1.025 ± 0.027
1.77GlnAsn: 1.77 ± 0.036
1.306GlnPro: 1.306 ± 0.028
1.553GlnGln: 1.553 ± 0.041
1.616GlnArg: 1.616 ± 0.033
2.016GlnSer: 2.016 ± 0.037
2.05GlnThr: 2.05 ± 0.048
2.202GlnVal: 2.202 ± 0.042
0.478GlnTrp: 0.478 ± 0.018
1.496GlnTyr: 1.496 ± 0.037
0.0GlnXaa: 0.0 ± 0.0
Arg
2.801ArgAla: 2.801 ± 0.05
0.493ArgCys: 0.493 ± 0.02
2.168ArgAsp: 2.168 ± 0.039
3.209ArgGlu: 3.209 ± 0.051
2.397ArgPhe: 2.397 ± 0.047
2.503ArgGly: 2.503 ± 0.049
0.917ArgHis: 0.917 ± 0.027
3.769ArgIle: 3.769 ± 0.052
3.512ArgLys: 3.512 ± 0.051
4.666ArgLeu: 4.666 ± 0.066
1.626ArgMet: 1.626 ± 0.029
2.545ArgAsn: 2.545 ± 0.044
1.65ArgPro: 1.65 ± 0.037
1.945ArgGln: 1.945 ± 0.04
2.283ArgArg: 2.283 ± 0.043
2.523ArgSer: 2.523 ± 0.046
2.557ArgThr: 2.557 ± 0.039
2.663ArgVal: 2.663 ± 0.04
0.664ArgTrp: 0.664 ± 0.024
2.292ArgTyr: 2.292 ± 0.046
0.0ArgXaa: 0.0 ± 0.0
Ser
4.12SerAla: 4.12 ± 0.062
0.905SerCys: 0.905 ± 0.025
3.308SerAsp: 3.308 ± 0.051
3.589SerGlu: 3.589 ± 0.054
3.324SerPhe: 3.324 ± 0.048
4.761SerGly: 4.761 ± 0.066
1.124SerHis: 1.124 ± 0.032
4.465SerIle: 4.465 ± 0.061
3.397SerLys: 3.397 ± 0.05
6.107SerLeu: 6.107 ± 0.068
1.49SerMet: 1.49 ± 0.035
2.675SerAsn: 2.675 ± 0.04
2.416SerPro: 2.416 ± 0.04
1.945SerGln: 1.945 ± 0.037
2.661SerArg: 2.661 ± 0.049
3.965SerSer: 3.965 ± 0.055
3.311SerThr: 3.311 ± 0.053
4.456SerVal: 4.456 ± 0.056
0.859SerTrp: 0.859 ± 0.025
2.836SerTyr: 2.836 ± 0.046
0.0SerXaa: 0.0 ± 0.0
Thr
3.957ThrAla: 3.957 ± 0.057
0.579ThrCys: 0.579 ± 0.021
3.496ThrAsp: 3.496 ± 0.05
3.391ThrGlu: 3.391 ± 0.048
2.743ThrPhe: 2.743 ± 0.045
4.51ThrGly: 4.51 ± 0.058
0.986ThrHis: 0.986 ± 0.023
3.869ThrIle: 3.869 ± 0.058
2.751ThrLys: 2.751 ± 0.042
5.597ThrLeu: 5.597 ± 0.068
1.177ThrMet: 1.177 ± 0.026
2.484ThrAsn: 2.484 ± 0.046
2.85ThrPro: 2.85 ± 0.04
1.801ThrGln: 1.801 ± 0.033
2.316ThrArg: 2.316 ± 0.037
3.233ThrSer: 3.233 ± 0.05
3.081ThrThr: 3.081 ± 0.042
4.122ThrVal: 4.122 ± 0.057
0.658ThrTrp: 0.658 ± 0.022
2.503ThrTyr: 2.503 ± 0.039
0.0ThrXaa: 0.0 ± 0.0
Val
4.519ValAla: 4.519 ± 0.068
0.954ValCys: 0.954 ± 0.026
3.531ValAsp: 3.531 ± 0.048
3.928ValGlu: 3.928 ± 0.054
3.008ValPhe: 3.008 ± 0.049
4.025ValGly: 4.025 ± 0.058
1.116ValHis: 1.116 ± 0.028
4.512ValIle: 4.512 ± 0.058
4.229ValLys: 4.229 ± 0.059
5.817ValLeu: 5.817 ± 0.061
1.654ValMet: 1.654 ± 0.035
3.36ValAsn: 3.36 ± 0.053
2.641ValPro: 2.641 ± 0.043
1.916ValGln: 1.916 ± 0.038
3.066ValArg: 3.066 ± 0.042
4.671ValSer: 4.671 ± 0.058
3.877ValThr: 3.877 ± 0.053
4.471ValVal: 4.471 ± 0.065
0.753ValTrp: 0.753 ± 0.023
2.74ValTyr: 2.74 ± 0.043
0.0ValXaa: 0.0 ± 0.0
Trp
0.711TrpAla: 0.711 ± 0.021
0.167TrpCys: 0.167 ± 0.01
0.7TrpAsp: 0.7 ± 0.024
0.811TrpGlu: 0.811 ± 0.024
0.576TrpPhe: 0.576 ± 0.02
0.995TrpGly: 0.995 ± 0.032
0.257TrpHis: 0.257 ± 0.013
0.873TrpIle: 0.873 ± 0.024
0.974TrpLys: 0.974 ± 0.024
1.129TrpLeu: 1.129 ± 0.028
0.448TrpMet: 0.448 ± 0.019
0.775TrpAsn: 0.775 ± 0.024
0.284TrpPro: 0.284 ± 0.014
0.512TrpGln: 0.512 ± 0.017
0.609TrpArg: 0.609 ± 0.021
0.699TrpSer: 0.699 ± 0.025
0.702TrpThr: 0.702 ± 0.022
0.712TrpVal: 0.712 ± 0.021
0.197TrpTrp: 0.197 ± 0.012
0.508TrpTyr: 0.508 ± 0.018
0.0TrpXaa: 0.0 ± 0.0
Tyr
2.903TyrAla: 2.903 ± 0.042
0.576TyrCys: 0.576 ± 0.019
2.546TyrAsp: 2.546 ± 0.042
2.406TyrGlu: 2.406 ± 0.041
2.241TyrPhe: 2.241 ± 0.044
2.949TyrGly: 2.949 ± 0.048
0.926TyrHis: 0.926 ± 0.023
2.877TyrIle: 2.877 ± 0.045
2.728TyrLys: 2.728 ± 0.048
4.275TyrLeu: 4.275 ± 0.05
1.099TyrMet: 1.099 ± 0.025
2.487TyrAsn: 2.487 ± 0.048
2.058TyrPro: 2.058 ± 0.041
1.613TyrGln: 1.613 ± 0.034
2.324TyrArg: 2.324 ± 0.044
2.812TyrSer: 2.812 ± 0.044
2.738TyrThr: 2.738 ± 0.043
2.466TyrVal: 2.466 ± 0.044
0.62TyrTrp: 0.62 ± 0.022
2.258TyrTyr: 2.258 ± 0.044
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 4234 proteins (1537139 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