Amino acid dipepetide frequency for Streptomyces sp. Z26

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
23.308AlaAla: 23.308 ± 0.196
1.066AlaCys: 1.066 ± 0.027
9.582AlaAsp: 9.582 ± 0.086
9.541AlaGlu: 9.541 ± 0.103
3.422AlaPhe: 3.422 ± 0.055
13.883AlaGly: 13.883 ± 0.107
3.121AlaHis: 3.121 ± 0.045
2.563AlaIle: 2.563 ± 0.05
2.449AlaLys: 2.449 ± 0.058
14.878AlaLeu: 14.878 ± 0.119
2.375AlaMet: 2.375 ± 0.041
1.74AlaAsn: 1.74 ± 0.035
8.218AlaPro: 8.218 ± 0.096
3.304AlaGln: 3.304 ± 0.052
11.908AlaArg: 11.908 ± 0.111
5.571AlaSer: 5.571 ± 0.067
7.005AlaThr: 7.005 ± 0.068
12.746AlaVal: 12.746 ± 0.107
1.725AlaTrp: 1.725 ± 0.032
3.068AlaTyr: 3.068 ± 0.045
0.0AlaXaa: 0.0 ± 0.0
Cys
1.235CysAla: 1.235 ± 0.026
0.091CysCys: 0.091 ± 0.009
0.498CysAsp: 0.498 ± 0.017
0.347CysGlu: 0.347 ± 0.015
0.21CysPhe: 0.21 ± 0.01
0.945CysGly: 0.945 ± 0.025
0.203CysHis: 0.203 ± 0.01
0.11CysIle: 0.11 ± 0.008
0.098CysLys: 0.098 ± 0.008
0.699CysLeu: 0.699 ± 0.018
0.118CysMet: 0.118 ± 0.008
0.107CysAsn: 0.107 ± 0.008
0.472CysPro: 0.472 ± 0.02
0.143CysGln: 0.143 ± 0.009
0.627CysArg: 0.627 ± 0.02
0.377CysSer: 0.377 ± 0.015
0.439CysThr: 0.439 ± 0.018
0.711CysVal: 0.711 ± 0.021
0.124CysTrp: 0.124 ± 0.008
0.141CysTyr: 0.141 ± 0.009
0.0CysXaa: 0.0 ± 0.0
Asp
9.244AspAla: 9.244 ± 0.095
0.422AspCys: 0.422 ± 0.017
4.176AspAsp: 4.176 ± 0.056
4.185AspGlu: 4.185 ± 0.053
1.631AspPhe: 1.631 ± 0.029
8.039AspGly: 8.039 ± 0.086
1.46AspHis: 1.46 ± 0.031
1.553AspIle: 1.553 ± 0.035
1.034AspLys: 1.034 ± 0.027
5.927AspLeu: 5.927 ± 0.059
0.831AspMet: 0.831 ± 0.02
0.79AspAsn: 0.79 ± 0.024
4.882AspPro: 4.882 ± 0.062
1.308AspGln: 1.308 ± 0.029
5.205AspArg: 5.205 ± 0.061
2.501AspSer: 2.501 ± 0.033
3.483AspThr: 3.483 ± 0.051
5.092AspVal: 5.092 ± 0.056
1.058AspTrp: 1.058 ± 0.026
1.039AspTyr: 1.039 ± 0.028
0.0AspXaa: 0.0 ± 0.0
Glu
7.568GluAla: 7.568 ± 0.087
0.388GluCys: 0.388 ± 0.015
2.973GluAsp: 2.973 ± 0.047
3.649GluGlu: 3.649 ± 0.052
1.489GluPhe: 1.489 ± 0.031
4.746GluGly: 4.746 ± 0.05
1.594GluHis: 1.594 ± 0.031
1.971GluIle: 1.971 ± 0.04
1.365GluLys: 1.365 ± 0.038
7.072GluLeu: 7.072 ± 0.077
0.854GluMet: 0.854 ± 0.026
0.926GluAsn: 0.926 ± 0.024
3.82GluPro: 3.82 ± 0.052
2.188GluGln: 2.188 ± 0.036
6.257GluArg: 6.257 ± 0.071
2.622GluSer: 2.622 ± 0.039
2.905GluThr: 2.905 ± 0.044
4.641GluVal: 4.641 ± 0.052
0.783GluTrp: 0.783 ± 0.022
1.078GluTyr: 1.078 ± 0.028
0.0GluXaa: 0.0 ± 0.0
Phe
3.573PheAla: 3.573 ± 0.046
0.247PheCys: 0.247 ± 0.012
1.947PheAsp: 1.947 ± 0.039
1.296PheGlu: 1.296 ± 0.024
0.78PhePhe: 0.78 ± 0.024
2.899PheGly: 2.899 ± 0.043
0.611PheHis: 0.611 ± 0.021
0.519PheIle: 0.519 ± 0.018
0.427PheLys: 0.427 ± 0.018
2.446PheLeu: 2.446 ± 0.044
0.354PheMet: 0.354 ± 0.017
0.456PheAsn: 0.456 ± 0.016
1.337PhePro: 1.337 ± 0.032
0.608PheGln: 0.608 ± 0.017
1.926PheArg: 1.926 ± 0.032
1.306PheSer: 1.306 ± 0.024
1.897PheThr: 1.897 ± 0.034
2.113PheVal: 2.113 ± 0.04
0.381PheTrp: 0.381 ± 0.015
0.508PheTyr: 0.508 ± 0.02
0.0PheXaa: 0.0 ± 0.0
Gly
13.109GlyAla: 13.109 ± 0.117
0.853GlyCys: 0.853 ± 0.026
6.0GlyAsp: 6.0 ± 0.062
5.514GlyGlu: 5.514 ± 0.062
2.668GlyPhe: 2.668 ± 0.039
10.938GlyGly: 10.938 ± 0.129
2.486GlyHis: 2.486 ± 0.041
2.782GlyIle: 2.782 ± 0.043
2.138GlyLys: 2.138 ± 0.044
9.47GlyLeu: 9.47 ± 0.082
2.094GlyMet: 2.094 ± 0.032
1.606GlyAsn: 1.606 ± 0.03
6.038GlyPro: 6.038 ± 0.074
2.564GlyGln: 2.564 ± 0.047
8.178GlyArg: 8.178 ± 0.078
5.191GlySer: 5.191 ± 0.056
7.167GlyThr: 7.167 ± 0.075
8.086GlyVal: 8.086 ± 0.079
1.738GlyTrp: 1.738 ± 0.034
2.159GlyTyr: 2.159 ± 0.048
0.0GlyXaa: 0.0 ± 0.0
His
2.899HisAla: 2.899 ± 0.044
0.216HisCys: 0.216 ± 0.012
1.418HisAsp: 1.418 ± 0.033
1.222HisGlu: 1.222 ± 0.027
0.637HisPhe: 0.637 ± 0.021
2.713HisGly: 2.713 ± 0.042
0.694HisHis: 0.694 ± 0.02
0.491HisIle: 0.491 ± 0.015
0.291HisLys: 0.291 ± 0.013
2.388HisLeu: 2.388 ± 0.037
0.326HisMet: 0.326 ± 0.013
0.311HisAsn: 0.311 ± 0.013
1.867HisPro: 1.867 ± 0.031
0.608HisGln: 0.608 ± 0.019
2.228HisArg: 2.228 ± 0.038
0.967HisSer: 0.967 ± 0.023
1.35HisThr: 1.35 ± 0.027
1.943HisVal: 1.943 ± 0.036
0.349HisTrp: 0.349 ± 0.014
0.435HisTyr: 0.435 ± 0.014
0.0HisXaa: 0.0 ± 0.0
Ile
3.7IleAla: 3.7 ± 0.057
0.212IleCys: 0.212 ± 0.01
1.795IleAsp: 1.795 ± 0.035
1.574IleGlu: 1.574 ± 0.033
0.531IlePhe: 0.531 ± 0.02
2.776IleGly: 2.776 ± 0.043
0.446IleHis: 0.446 ± 0.018
0.618IleIle: 0.618 ± 0.022
0.556IleLys: 0.556 ± 0.019
1.8IleLeu: 1.8 ± 0.041
0.348IleMet: 0.348 ± 0.015
0.53IleAsn: 0.53 ± 0.02
1.323IlePro: 1.323 ± 0.027
0.553IleGln: 0.553 ± 0.018
1.837IleArg: 1.837 ± 0.033
1.312IleSer: 1.312 ± 0.028
1.648IleThr: 1.648 ± 0.035
2.102IleVal: 2.102 ± 0.037
0.264IleTrp: 0.264 ± 0.012
0.414IleTyr: 0.414 ± 0.017
0.0IleXaa: 0.0 ± 0.0
Lys
2.402LysAla: 2.402 ± 0.055
0.105LysCys: 0.105 ± 0.007
1.104LysAsp: 1.104 ± 0.029
1.061LysGlu: 1.061 ± 0.03
0.363LysPhe: 0.363 ± 0.014
1.649LysGly: 1.649 ± 0.04
0.393LysHis: 0.393 ± 0.015
0.646LysIle: 0.646 ± 0.024
0.713LysLys: 0.713 ± 0.029
1.738LysLeu: 1.738 ± 0.035
0.333LysMet: 0.333 ± 0.014
0.4LysAsn: 0.4 ± 0.018
1.164LysPro: 1.164 ± 0.032
0.587LysGln: 0.587 ± 0.021
1.382LysArg: 1.382 ± 0.033
0.973LysSer: 0.973 ± 0.024
0.997LysThr: 0.997 ± 0.028
1.532LysVal: 1.532 ± 0.036
0.225LysTrp: 0.225 ± 0.014
0.363LysTyr: 0.363 ± 0.016
0.0LysXaa: 0.0 ± 0.0
Leu
15.46LeuAla: 15.46 ± 0.12
0.832LeuCys: 0.832 ± 0.025
6.992LeuAsp: 6.992 ± 0.082
4.84LeuGlu: 4.84 ± 0.06
2.445LeuPhe: 2.445 ± 0.04
9.147LeuGly: 9.147 ± 0.086
2.381LeuHis: 2.381 ± 0.039
2.431LeuIle: 2.431 ± 0.039
1.646LeuLys: 1.646 ± 0.038
11.5LeuLeu: 11.5 ± 0.117
1.452LeuMet: 1.452 ± 0.032
1.515LeuAsn: 1.515 ± 0.029
6.558LeuPro: 6.558 ± 0.081
1.875LeuGln: 1.875 ± 0.037
9.397LeuArg: 9.397 ± 0.083
4.958LeuSer: 4.958 ± 0.057
6.692LeuThr: 6.692 ± 0.064
8.928LeuVal: 8.928 ± 0.085
1.265LeuTrp: 1.265 ± 0.027
1.76LeuTyr: 1.76 ± 0.03
0.0LeuXaa: 0.0 ± 0.0
Met
2.144MetAla: 2.144 ± 0.039
0.122MetCys: 0.122 ± 0.007
0.859MetAsp: 0.859 ± 0.022
0.723MetGlu: 0.723 ± 0.023
0.412MetPhe: 0.412 ± 0.016
1.261MetGly: 1.261 ± 0.032
0.317MetHis: 0.317 ± 0.012
0.515MetIle: 0.515 ± 0.017
0.335MetLys: 0.335 ± 0.014
1.587MetLeu: 1.587 ± 0.036
0.279MetMet: 0.279 ± 0.012
0.357MetAsn: 0.357 ± 0.015
1.093MetPro: 1.093 ± 0.025
0.409MetGln: 0.409 ± 0.018
1.451MetArg: 1.451 ± 0.035
1.242MetSer: 1.242 ± 0.024
1.395MetThr: 1.395 ± 0.032
1.234MetVal: 1.234 ± 0.028
0.191MetTrp: 0.191 ± 0.012
0.298MetTyr: 0.298 ± 0.012
0.0MetXaa: 0.0 ± 0.0
Asn
2.025AsnAla: 2.025 ± 0.036
0.148AsnCys: 0.148 ± 0.01
0.899AsnAsp: 0.899 ± 0.026
0.804AsnGlu: 0.804 ± 0.024
0.412AsnPhe: 0.412 ± 0.014
1.815AsnGly: 1.815 ± 0.038
0.331AsnHis: 0.331 ± 0.015
0.495AsnIle: 0.495 ± 0.017
0.328AsnLys: 0.328 ± 0.014
1.394AsnLeu: 1.394 ± 0.03
0.265AsnMet: 0.265 ± 0.012
0.332AsnAsn: 0.332 ± 0.015
1.113AsnPro: 1.113 ± 0.029
0.408AsnGln: 0.408 ± 0.018
1.098AsnArg: 1.098 ± 0.03
0.814AsnSer: 0.814 ± 0.023
0.903AsnThr: 0.903 ± 0.028
1.242AsnVal: 1.242 ± 0.03
0.223AsnTrp: 0.223 ± 0.012
0.349AsnTyr: 0.349 ± 0.015
0.0AsnXaa: 0.0 ± 0.0
Pro
8.935ProAla: 8.935 ± 0.101
0.337ProCys: 0.337 ± 0.014
5.304ProAsp: 5.304 ± 0.068
4.902ProGlu: 4.902 ± 0.059
1.502ProPhe: 1.502 ± 0.031
7.432ProGly: 7.432 ± 0.09
1.476ProHis: 1.476 ± 0.025
0.983ProIle: 0.983 ± 0.024
0.982ProLys: 0.982 ± 0.024
5.455ProLeu: 5.455 ± 0.066
0.956ProMet: 0.956 ± 0.023
0.807ProAsn: 0.807 ± 0.02
4.142ProPro: 4.142 ± 0.078
1.552ProGln: 1.552 ± 0.042
4.552ProArg: 4.552 ± 0.053
3.081ProSer: 3.081 ± 0.048
3.106ProThr: 3.106 ± 0.048
5.738ProVal: 5.738 ± 0.064
0.878ProTrp: 0.878 ± 0.023
1.593ProTyr: 1.593 ± 0.037
0.0ProXaa: 0.0 ± 0.0
Gln
3.212GlnAla: 3.212 ± 0.056
0.139GlnCys: 0.139 ± 0.009
1.244GlnAsp: 1.244 ± 0.028
1.296GlnGlu: 1.296 ± 0.033
0.603GlnPhe: 0.603 ± 0.019
2.052GlnGly: 2.052 ± 0.035
0.626GlnHis: 0.626 ± 0.018
0.843GlnIle: 0.843 ± 0.027
0.485GlnLys: 0.485 ± 0.02
2.945GlnLeu: 2.945 ± 0.044
0.392GlnMet: 0.392 ± 0.015
0.385GlnAsn: 0.385 ± 0.017
1.684GlnPro: 1.684 ± 0.04
1.155GlnGln: 1.155 ± 0.034
2.487GlnArg: 2.487 ± 0.048
1.061GlnSer: 1.061 ± 0.024
1.178GlnThr: 1.178 ± 0.027
2.039GlnVal: 2.039 ± 0.036
0.348GlnTrp: 0.348 ± 0.014
0.489GlnTyr: 0.489 ± 0.02
0.0GlnXaa: 0.0 ± 0.0
Arg
11.46ArgAla: 11.46 ± 0.105
0.648ArgCys: 0.648 ± 0.021
5.064ArgAsp: 5.064 ± 0.061
5.315ArgGlu: 5.315 ± 0.061
2.338ArgPhe: 2.338 ± 0.037
6.707ArgGly: 6.707 ± 0.069
2.397ArgHis: 2.397 ± 0.036
2.569ArgIle: 2.569 ± 0.044
1.533ArgLys: 1.533 ± 0.04
9.219ArgLeu: 9.219 ± 0.083
1.737ArgMet: 1.737 ± 0.034
1.338ArgAsn: 1.338 ± 0.025
5.253ArgPro: 5.253 ± 0.069
2.307ArgGln: 2.307 ± 0.037
8.398ArgArg: 8.398 ± 0.094
3.834ArgSer: 3.834 ± 0.049
6.269ArgThr: 6.269 ± 0.062
6.797ArgVal: 6.797 ± 0.071
1.415ArgTrp: 1.415 ± 0.033
1.775ArgTyr: 1.775 ± 0.034
0.0ArgXaa: 0.0 ± 0.0
Ser
6.351SerAla: 6.351 ± 0.069
0.352SerCys: 0.352 ± 0.016
2.568SerAsp: 2.568 ± 0.039
2.277SerGlu: 2.277 ± 0.043
1.357SerPhe: 1.357 ± 0.029
6.072SerGly: 6.072 ± 0.069
0.95SerHis: 0.95 ± 0.025
1.048SerIle: 1.048 ± 0.024
0.808SerLys: 0.808 ± 0.024
4.5SerLeu: 4.5 ± 0.062
0.92SerMet: 0.92 ± 0.023
0.74SerAsn: 0.74 ± 0.023
3.021SerPro: 3.021 ± 0.046
1.038SerGln: 1.038 ± 0.025
3.609SerArg: 3.609 ± 0.052
2.464SerSer: 2.464 ± 0.049
2.737SerThr: 2.737 ± 0.043
4.137SerVal: 4.137 ± 0.049
0.844SerTrp: 0.844 ± 0.021
1.113SerTyr: 1.113 ± 0.026
0.0SerXaa: 0.0 ± 0.0
Thr
9.026ThrAla: 9.026 ± 0.081
0.388ThrCys: 0.388 ± 0.014
3.773ThrAsp: 3.773 ± 0.052
3.371ThrGlu: 3.371 ± 0.05
1.527ThrPhe: 1.527 ± 0.028
7.411ThrGly: 7.411 ± 0.07
1.174ThrHis: 1.174 ± 0.028
1.22ThrIle: 1.22 ± 0.028
0.948ThrLys: 0.948 ± 0.027
5.593ThrLeu: 5.593 ± 0.058
0.862ThrMet: 0.862 ± 0.025
0.874ThrAsn: 0.874 ± 0.025
4.194ThrPro: 4.194 ± 0.057
1.12ThrGln: 1.12 ± 0.026
4.167ThrArg: 4.167 ± 0.053
2.833ThrSer: 2.833 ± 0.046
3.473ThrThr: 3.473 ± 0.056
6.127ThrVal: 6.127 ± 0.067
0.797ThrTrp: 0.797 ± 0.022
1.334ThrTyr: 1.334 ± 0.031
0.0ThrXaa: 0.0 ± 0.0
Val
11.22ValAla: 11.22 ± 0.1
0.811ValCys: 0.811 ± 0.023
5.293ValAsp: 5.293 ± 0.06
4.886ValGlu: 4.886 ± 0.062
2.284ValPhe: 2.284 ± 0.043
6.726ValGly: 6.726 ± 0.072
1.946ValHis: 1.946 ± 0.035
2.227ValIle: 2.227 ± 0.042
1.443ValLys: 1.443 ± 0.032
9.803ValLeu: 9.803 ± 0.091
1.248ValMet: 1.248 ± 0.029
1.512ValAsn: 1.512 ± 0.031
5.681ValPro: 5.681 ± 0.063
1.858ValGln: 1.858 ± 0.036
8.576ValArg: 8.576 ± 0.082
4.143ValSer: 4.143 ± 0.053
5.565ValThr: 5.565 ± 0.061
8.047ValVal: 8.047 ± 0.077
1.134ValTrp: 1.134 ± 0.023
1.452ValTyr: 1.452 ± 0.027
0.0ValXaa: 0.0 ± 0.0
Trp
1.572TrpAla: 1.572 ± 0.034
0.168TrpCys: 0.168 ± 0.009
0.843TrpAsp: 0.843 ± 0.025
0.753TrpGlu: 0.753 ± 0.023
0.459TrpPhe: 0.459 ± 0.017
1.019TrpGly: 1.019 ± 0.025
0.377TrpHis: 0.377 ± 0.013
0.419TrpIle: 0.419 ± 0.014
0.282TrpLys: 0.282 ± 0.013
1.721TrpLeu: 1.721 ± 0.03
0.267TrpMet: 0.267 ± 0.013
0.352TrpAsn: 0.352 ± 0.015
0.791TrpPro: 0.791 ± 0.021
0.56TrpGln: 0.56 ± 0.018
1.394TrpArg: 1.394 ± 0.027
0.869TrpSer: 0.869 ± 0.025
0.979TrpThr: 0.979 ± 0.023
0.924TrpVal: 0.924 ± 0.025
0.304TrpTrp: 0.304 ± 0.012
0.32TrpTyr: 0.32 ± 0.015
0.0TrpXaa: 0.0 ± 0.0
Tyr
3.031TyrAla: 3.031 ± 0.042
0.15TyrCys: 0.15 ± 0.01
1.527TyrAsp: 1.527 ± 0.038
1.334TyrGlu: 1.334 ± 0.029
0.56TyrPhe: 0.56 ± 0.02
2.551TyrGly: 2.551 ± 0.043
0.37TyrHis: 0.37 ± 0.013
0.337TyrIle: 0.337 ± 0.014
0.271TyrLys: 0.271 ± 0.013
1.939TyrLeu: 1.939 ± 0.037
0.213TyrMet: 0.213 ± 0.012
0.321TyrAsn: 0.321 ± 0.013
1.062TyrPro: 1.062 ± 0.028
0.514TyrGln: 0.514 ± 0.017
1.695TyrArg: 1.695 ± 0.032
0.787TyrSer: 0.787 ± 0.021
1.022TyrThr: 1.022 ± 0.026
1.675TyrVal: 1.675 ± 0.033
0.328TyrTrp: 0.328 ± 0.013
0.368TyrTyr: 0.368 ± 0.015
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 5304 proteins (1814538 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