Amino acid dipepetide frequency for Clostridium sp. CAG:571

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
2.439AlaAla: 2.439 ± 0.093
0.529AlaCys: 0.529 ± 0.039
2.423AlaAsp: 2.423 ± 0.078
3.355AlaGlu: 3.355 ± 0.103
1.914AlaPhe: 1.914 ± 0.074
3.016AlaGly: 3.016 ± 0.091
0.659AlaHis: 0.659 ± 0.038
5.367AlaIle: 5.367 ± 0.138
5.283AlaLys: 5.283 ± 0.122
3.932AlaLeu: 3.932 ± 0.105
1.266AlaMet: 1.266 ± 0.061
2.915AlaAsn: 2.915 ± 0.093
1.072AlaPro: 1.072 ± 0.058
1.069AlaGln: 1.069 ± 0.055
1.848AlaArg: 1.848 ± 0.076
2.839AlaSer: 2.839 ± 0.092
2.638AlaThr: 2.638 ± 0.09
3.043AlaVal: 3.043 ± 0.092
0.272AlaTrp: 0.272 ± 0.027
1.846AlaTyr: 1.846 ± 0.064
0.0AlaXaa: 0.0 ± 0.0
Cys
0.543CysAla: 0.543 ± 0.03
0.183CysCys: 0.183 ± 0.025
0.575CysAsp: 0.575 ± 0.04
0.735CysGlu: 0.735 ± 0.053
0.524CysPhe: 0.524 ± 0.037
0.886CysGly: 0.886 ± 0.053
0.176CysHis: 0.176 ± 0.023
1.324CysIle: 1.324 ± 0.056
1.257CysLys: 1.257 ± 0.063
0.882CysLeu: 0.882 ± 0.044
0.318CysMet: 0.318 ± 0.027
0.831CysAsn: 0.831 ± 0.046
0.378CysPro: 0.378 ± 0.037
0.238CysGln: 0.238 ± 0.027
0.323CysArg: 0.323 ± 0.032
0.657CysSer: 0.657 ± 0.04
0.637CysThr: 0.637 ± 0.041
0.632CysVal: 0.632 ± 0.038
0.078CysTrp: 0.078 ± 0.013
0.465CysTyr: 0.465 ± 0.034
0.0CysXaa: 0.0 ± 0.0
Asp
2.272AspAla: 2.272 ± 0.079
0.643AspCys: 0.643 ± 0.042
2.922AspAsp: 2.922 ± 0.113
5.173AspGlu: 5.173 ± 0.116
2.62AspPhe: 2.62 ± 0.079
3.286AspGly: 3.286 ± 0.1
0.499AspHis: 0.499 ± 0.038
6.402AspIle: 6.402 ± 0.138
5.612AspLys: 5.612 ± 0.124
4.742AspLeu: 4.742 ± 0.122
1.39AspMet: 1.39 ± 0.053
3.694AspAsn: 3.694 ± 0.113
1.072AspPro: 1.072 ± 0.054
0.882AspGln: 0.882 ± 0.047
1.626AspArg: 1.626 ± 0.062
3.247AspSer: 3.247 ± 0.093
2.739AspThr: 2.739 ± 0.084
3.517AspVal: 3.517 ± 0.099
0.366AspTrp: 0.366 ± 0.031
2.622AspTyr: 2.622 ± 0.075
0.0AspXaa: 0.0 ± 0.0
Glu
3.719GluAla: 3.719 ± 0.095
0.779GluCys: 0.779 ± 0.046
4.568GluAsp: 4.568 ± 0.121
8.255GluGlu: 8.255 ± 0.188
3.13GluPhe: 3.13 ± 0.093
3.41GluGly: 3.41 ± 0.088
0.904GluHis: 0.904 ± 0.05
8.585GluIle: 8.585 ± 0.179
10.38GluLys: 10.38 ± 0.227
6.895GluLeu: 6.895 ± 0.144
2.114GluMet: 2.114 ± 0.068
7.369GluAsn: 7.369 ± 0.164
1.324GluPro: 1.324 ± 0.062
2.223GluGln: 2.223 ± 0.076
2.473GluArg: 2.473 ± 0.095
3.648GluSer: 3.648 ± 0.098
3.332GluThr: 3.332 ± 0.094
4.573GluVal: 4.573 ± 0.104
0.396GluTrp: 0.396 ± 0.029
3.939GluTyr: 3.939 ± 0.102
0.0GluXaa: 0.0 ± 0.0
Phe
2.091PheAla: 2.091 ± 0.082
0.607PheCys: 0.607 ± 0.037
2.434PheAsp: 2.434 ± 0.064
3.078PheGlu: 3.078 ± 0.084
1.823PhePhe: 1.823 ± 0.069
2.368PheGly: 2.368 ± 0.078
0.447PheHis: 0.447 ± 0.034
4.245PheIle: 4.245 ± 0.132
3.492PheLys: 3.492 ± 0.096
3.501PheLeu: 3.501 ± 0.114
1.003PheMet: 1.003 ± 0.049
2.727PheAsn: 2.727 ± 0.084
1.01PhePro: 1.01 ± 0.054
0.776PheGln: 0.776 ± 0.043
1.253PheArg: 1.253 ± 0.056
2.837PheSer: 2.837 ± 0.091
1.994PheThr: 1.994 ± 0.06
2.537PheVal: 2.537 ± 0.078
0.339PheTrp: 0.339 ± 0.028
1.843PheTyr: 1.843 ± 0.069
0.0PheXaa: 0.0 ± 0.0
Gly
2.938GlyAla: 2.938 ± 0.104
0.737GlyCys: 0.737 ± 0.048
2.837GlyAsp: 2.837 ± 0.076
3.893GlyGlu: 3.893 ± 0.113
2.4GlyPhe: 2.4 ± 0.074
2.993GlyGly: 2.993 ± 0.101
0.859GlyHis: 0.859 ± 0.052
6.173GlyIle: 6.173 ± 0.139
6.054GlyLys: 6.054 ± 0.13
4.216GlyLeu: 4.216 ± 0.106
1.415GlyMet: 1.415 ± 0.067
3.286GlyAsn: 3.286 ± 0.109
0.879GlyPro: 0.879 ± 0.047
1.253GlyGln: 1.253 ± 0.057
1.99GlyArg: 1.99 ± 0.08
2.807GlySer: 2.807 ± 0.09
3.32GlyThr: 3.32 ± 0.101
3.442GlyVal: 3.442 ± 0.092
0.341GlyTrp: 0.341 ± 0.025
2.871GlyTyr: 2.871 ± 0.087
0.0GlyXaa: 0.0 ± 0.0
His
0.547HisAla: 0.547 ± 0.038
0.192HisCys: 0.192 ± 0.024
0.575HisAsp: 0.575 ± 0.04
0.641HisGlu: 0.641 ± 0.04
0.598HisPhe: 0.598 ± 0.044
0.792HisGly: 0.792 ± 0.043
0.252HisHis: 0.252 ± 0.023
1.211HisIle: 1.211 ± 0.055
0.978HisLys: 0.978 ± 0.048
0.943HisLeu: 0.943 ± 0.042
0.311HisMet: 0.311 ± 0.024
0.705HisAsn: 0.705 ± 0.043
0.534HisPro: 0.534 ± 0.038
0.302HisGln: 0.302 ± 0.026
0.414HisArg: 0.414 ± 0.031
0.744HisSer: 0.744 ± 0.044
0.598HisThr: 0.598 ± 0.038
0.611HisVal: 0.611 ± 0.038
0.085HisTrp: 0.085 ± 0.017
0.453HisTyr: 0.453 ± 0.033
0.0HisXaa: 0.0 ± 0.0
Ile
5.507IleAla: 5.507 ± 0.132
1.427IleCys: 1.427 ± 0.063
6.077IleAsp: 6.077 ± 0.116
8.447IleGlu: 8.447 ± 0.164
4.236IlePhe: 4.236 ± 0.149
5.635IleGly: 5.635 ± 0.133
1.033IleHis: 1.033 ± 0.053
10.817IleIle: 10.817 ± 0.249
10.671IleLys: 10.671 ± 0.178
9.562IleLeu: 9.562 ± 0.224
2.251IleMet: 2.251 ± 0.079
7.332IleAsn: 7.332 ± 0.164
3.08IlePro: 3.08 ± 0.094
2.567IleGln: 2.567 ± 0.076
3.041IleArg: 3.041 ± 0.092
7.028IleSer: 7.028 ± 0.135
5.573IleThr: 5.573 ± 0.152
6.563IleVal: 6.563 ± 0.134
0.559IleTrp: 0.559 ± 0.033
4.323IleTyr: 4.323 ± 0.114
0.0IleXaa: 0.0 ± 0.0
Lys
4.49LysAla: 4.49 ± 0.112
0.992LysCys: 0.992 ± 0.055
6.194LysAsp: 6.194 ± 0.136
11.2LysGlu: 11.2 ± 0.214
3.503LysPhe: 3.503 ± 0.103
4.364LysGly: 4.364 ± 0.099
1.024LysHis: 1.024 ± 0.046
11.303LysIle: 11.303 ± 0.212
11.493LysLys: 11.493 ± 0.222
8.463LysLeu: 8.463 ± 0.148
2.92LysMet: 2.92 ± 0.085
8.743LysAsn: 8.743 ± 0.171
2.052LysPro: 2.052 ± 0.073
3.357LysGln: 3.357 ± 0.095
3.483LysArg: 3.483 ± 0.098
5.276LysSer: 5.276 ± 0.122
5.207LysThr: 5.207 ± 0.116
6.37LysVal: 6.37 ± 0.154
0.641LysTrp: 0.641 ± 0.041
5.477LysTyr: 5.477 ± 0.123
0.0LysXaa: 0.0 ± 0.0
Leu
4.39LeuAla: 4.39 ± 0.103
0.962LeuCys: 0.962 ± 0.054
4.854LeuAsp: 4.854 ± 0.111
7.064LeuGlu: 7.064 ± 0.152
3.3LeuPhe: 3.3 ± 0.105
4.93LeuGly: 4.93 ± 0.11
1.003LeuHis: 1.003 ± 0.059
7.687LeuIle: 7.687 ± 0.16
8.978LeuLys: 8.978 ± 0.171
7.096LeuLeu: 7.096 ± 0.153
1.795LeuMet: 1.795 ± 0.067
5.917LeuAsn: 5.917 ± 0.12
2.343LeuPro: 2.343 ± 0.075
2.097LeuGln: 2.097 ± 0.08
2.679LeuArg: 2.679 ± 0.082
5.37LeuSer: 5.37 ± 0.122
4.174LeuThr: 4.174 ± 0.099
4.82LeuVal: 4.82 ± 0.107
0.435LeuTrp: 0.435 ± 0.032
3.403LeuTyr: 3.403 ± 0.09
0.0LeuXaa: 0.0 ± 0.0
Met
1.445MetAla: 1.445 ± 0.066
0.314MetCys: 0.314 ± 0.029
1.239MetAsp: 1.239 ± 0.051
1.811MetGlu: 1.811 ± 0.071
0.975MetPhe: 0.975 ± 0.048
1.305MetGly: 1.305 ± 0.062
0.295MetHis: 0.295 ± 0.027
2.187MetIle: 2.187 ± 0.078
2.716MetLys: 2.716 ± 0.08
2.242MetLeu: 2.242 ± 0.069
0.561MetMet: 0.561 ± 0.033
1.729MetAsn: 1.729 ± 0.065
0.909MetPro: 0.909 ± 0.044
1.021MetGln: 1.021 ± 0.054
0.698MetArg: 0.698 ± 0.038
1.36MetSer: 1.36 ± 0.057
1.014MetThr: 1.014 ± 0.051
1.246MetVal: 1.246 ± 0.05
0.149MetTrp: 0.149 ± 0.021
0.987MetTyr: 0.987 ± 0.05
0.0MetXaa: 0.0 ± 0.0
Asn
2.86AsnAla: 2.86 ± 0.08
0.87AsnCys: 0.87 ± 0.053
3.407AsnAsp: 3.407 ± 0.088
5.709AsnGlu: 5.709 ± 0.123
2.855AsnPhe: 2.855 ± 0.088
3.939AsnGly: 3.939 ± 0.122
0.694AsnHis: 0.694 ± 0.04
8.411AsnIle: 8.411 ± 0.167
8.131AsnLys: 8.131 ± 0.162
6.219AsnLeu: 6.219 ± 0.132
1.768AsnMet: 1.768 ± 0.066
6.178AsnAsn: 6.178 ± 0.173
2.01AsnPro: 2.01 ± 0.069
1.873AsnGln: 1.873 ± 0.07
2.093AsnArg: 2.093 ± 0.073
4.598AsnSer: 4.598 ± 0.127
3.819AsnThr: 3.819 ± 0.145
4.314AsnVal: 4.314 ± 0.123
0.492AsnTrp: 0.492 ± 0.034
3.24AsnTyr: 3.24 ± 0.098
0.0AsnXaa: 0.0 ± 0.0
Pro
1.049ProAla: 1.049 ± 0.055
0.337ProCys: 0.337 ± 0.028
1.491ProAsp: 1.491 ± 0.072
2.283ProGlu: 2.283 ± 0.078
1.099ProPhe: 1.099 ± 0.051
1.392ProGly: 1.392 ± 0.069
0.364ProHis: 0.364 ± 0.032
2.533ProIle: 2.533 ± 0.082
2.191ProLys: 2.191 ± 0.076
1.704ProLeu: 1.704 ± 0.06
0.552ProMet: 0.552 ± 0.038
1.617ProAsn: 1.617 ± 0.064
0.421ProPro: 0.421 ± 0.038
0.639ProGln: 0.639 ± 0.041
0.758ProArg: 0.758 ± 0.041
1.376ProSer: 1.376 ± 0.054
1.326ProThr: 1.326 ± 0.06
1.69ProVal: 1.69 ± 0.073
0.176ProTrp: 0.176 ± 0.023
1.072ProTyr: 1.072 ± 0.052
0.0ProXaa: 0.0 ± 0.0
Gln
1.31GlnAla: 1.31 ± 0.055
0.224GlnCys: 0.224 ± 0.021
1.5GlnAsp: 1.5 ± 0.055
2.29GlnGlu: 2.29 ± 0.084
0.799GlnPhe: 0.799 ± 0.04
1.429GlnGly: 1.429 ± 0.062
0.229GlnHis: 0.229 ± 0.022
2.784GlnIle: 2.784 ± 0.08
2.878GlnLys: 2.878 ± 0.085
1.832GlnLeu: 1.832 ± 0.069
0.678GlnMet: 0.678 ± 0.043
2.155GlnAsn: 2.155 ± 0.076
0.433GlnPro: 0.433 ± 0.042
0.499GlnGln: 0.499 ± 0.038
0.927GlnArg: 0.927 ± 0.047
1.273GlnSer: 1.273 ± 0.053
1.372GlnThr: 1.372 ± 0.056
1.468GlnVal: 1.468 ± 0.059
0.135GlnTrp: 0.135 ± 0.018
1.067GlnTyr: 1.067 ± 0.056
0.0GlnXaa: 0.0 ± 0.0
Arg
1.553ArgAla: 1.553 ± 0.06
0.408ArgCys: 0.408 ± 0.037
1.717ArgAsp: 1.717 ± 0.072
2.487ArgGlu: 2.487 ± 0.079
1.381ArgPhe: 1.381 ± 0.06
1.717ArgGly: 1.717 ± 0.064
0.389ArgHis: 0.389 ± 0.029
3.203ArgIle: 3.203 ± 0.095
3.675ArgLys: 3.675 ± 0.094
2.62ArgLeu: 2.62 ± 0.089
0.875ArgMet: 0.875 ± 0.051
2.246ArgAsn: 2.246 ± 0.08
0.813ArgPro: 0.813 ± 0.052
0.921ArgGln: 0.921 ± 0.043
1.53ArgArg: 1.53 ± 0.067
1.495ArgSer: 1.495 ± 0.058
1.601ArgThr: 1.601 ± 0.07
1.914ArgVal: 1.914 ± 0.072
0.25ArgTrp: 0.25 ± 0.024
1.388ArgTyr: 1.388 ± 0.051
0.0ArgXaa: 0.0 ± 0.0
Ser
2.521SerAla: 2.521 ± 0.081
0.545SerCys: 0.545 ± 0.036
3.199SerAsp: 3.199 ± 0.091
4.174SerGlu: 4.174 ± 0.112
2.581SerPhe: 2.581 ± 0.081
3.636SerGly: 3.636 ± 0.102
0.701SerHis: 0.701 ± 0.04
6.363SerIle: 6.363 ± 0.141
6.389SerLys: 6.389 ± 0.126
4.838SerLeu: 4.838 ± 0.12
1.319SerMet: 1.319 ± 0.055
4.49SerAsn: 4.49 ± 0.127
1.291SerPro: 1.291 ± 0.059
1.525SerGln: 1.525 ± 0.064
1.88SerArg: 1.88 ± 0.068
4.17SerSer: 4.17 ± 0.128
3.016SerThr: 3.016 ± 0.104
3.375SerVal: 3.375 ± 0.093
0.401SerTrp: 0.401 ± 0.036
2.622SerTyr: 2.622 ± 0.085
0.0SerXaa: 0.0 ± 0.0
Thr
2.626ThrAla: 2.626 ± 0.087
0.49ThrCys: 0.49 ± 0.033
2.828ThrAsp: 2.828 ± 0.079
3.302ThrGlu: 3.302 ± 0.098
2.164ThrPhe: 2.164 ± 0.073
3.341ThrGly: 3.341 ± 0.115
0.65ThrHis: 0.65 ± 0.046
5.484ThrIle: 5.484 ± 0.133
5.099ThrLys: 5.099 ± 0.112
4.197ThrLeu: 4.197 ± 0.1
1.111ThrMet: 1.111 ± 0.048
3.641ThrAsn: 3.641 ± 0.109
1.52ThrPro: 1.52 ± 0.061
1.2ThrGln: 1.2 ± 0.065
1.587ThrArg: 1.587 ± 0.067
3.339ThrSer: 3.339 ± 0.105
3.103ThrThr: 3.103 ± 0.159
3.334ThrVal: 3.334 ± 0.108
0.355ThrTrp: 0.355 ± 0.033
2.324ThrTyr: 2.324 ± 0.073
0.0ThrXaa: 0.0 ± 0.0
Val
3.217ValAla: 3.217 ± 0.109
0.76ValCys: 0.76 ± 0.047
3.389ValAsp: 3.389 ± 0.1
4.456ValGlu: 4.456 ± 0.102
2.317ValPhe: 2.317 ± 0.075
3.32ValGly: 3.32 ± 0.087
0.696ValHis: 0.696 ± 0.038
6.24ValIle: 6.24 ± 0.122
6.091ValLys: 6.091 ± 0.131
5.283ValLeu: 5.283 ± 0.122
1.369ValMet: 1.369 ± 0.057
3.902ValAsn: 3.902 ± 0.096
1.708ValPro: 1.708 ± 0.076
1.603ValGln: 1.603 ± 0.063
1.82ValArg: 1.82 ± 0.068
3.927ValSer: 3.927 ± 0.113
3.416ValThr: 3.416 ± 0.126
3.973ValVal: 3.973 ± 0.138
0.382ValTrp: 0.382 ± 0.027
2.386ValTyr: 2.386 ± 0.079
0.0ValXaa: 0.0 ± 0.0
Trp
0.263TrpAla: 0.263 ± 0.025
0.101TrpCys: 0.101 ± 0.017
0.387TrpAsp: 0.387 ± 0.028
0.389TrpGlu: 0.389 ± 0.031
0.289TrpPhe: 0.289 ± 0.029
0.357TrpGly: 0.357 ± 0.027
0.108TrpHis: 0.108 ± 0.015
0.588TrpIle: 0.588 ± 0.039
0.55TrpLys: 0.55 ± 0.041
0.543TrpLeu: 0.543 ± 0.038
0.174TrpMet: 0.174 ± 0.02
0.572TrpAsn: 0.572 ± 0.038
0.121TrpPro: 0.121 ± 0.018
0.213TrpGln: 0.213 ± 0.025
0.215TrpArg: 0.215 ± 0.024
0.343TrpSer: 0.343 ± 0.03
0.277TrpThr: 0.277 ± 0.03
0.309TrpVal: 0.309 ± 0.025
0.069TrpTrp: 0.069 ± 0.013
0.343TrpTyr: 0.343 ± 0.03
0.0TrpXaa: 0.0 ± 0.0
Tyr
1.946TyrAla: 1.946 ± 0.074
0.543TyrCys: 0.543 ± 0.036
2.709TyrAsp: 2.709 ± 0.08
3.272TyrGlu: 3.272 ± 0.085
1.896TyrPhe: 1.896 ± 0.077
2.588TyrGly: 2.588 ± 0.089
0.506TyrHis: 0.506 ± 0.032
4.82TyrIle: 4.82 ± 0.131
4.632TyrLys: 4.632 ± 0.128
3.588TyrLeu: 3.588 ± 0.096
1.012TyrMet: 1.012 ± 0.05
3.432TyrAsn: 3.432 ± 0.093
1.099TyrPro: 1.099 ± 0.057
1.024TyrGln: 1.024 ± 0.054
1.543TyrArg: 1.543 ± 0.068
2.704TyrSer: 2.704 ± 0.08
2.539TyrThr: 2.539 ± 0.087
2.526TyrVal: 2.526 ± 0.089
0.291TyrTrp: 0.291 ± 0.029
2.033TyrTyr: 2.033 ± 0.074
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 1620 proteins (436713 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