Amino acid dipepetide frequency for bacterium HR27

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.

	Ala	Cys	Asp	Glu	Phe	Gly	His	Ile	Lys	Leu	Met	Asn	Pro	Gln	Arg	Ser	Thr	Val	Trp	Tyr	Xaa
Ala	15.3AlaAla: 15.3 ± 0.235	1.096AlaCys: 1.096 ± 0.045	5.216AlaAsp: 5.216 ± 0.09	8.123AlaGlu: 8.123 ± 0.151	3.753AlaPhe: 3.753 ± 0.098	9.366AlaGly: 9.366 ± 0.123	2.28AlaHis: 2.28 ± 0.072	5.815AlaIle: 5.815 ± 0.102	1.778AlaLys: 1.778 ± 0.057	14.638AlaLeu: 14.638 ± 0.222	2.189AlaMet: 2.189 ± 0.06	1.935AlaAsn: 1.935 ± 0.06	5.364AlaPro: 5.364 ± 0.1	4.114AlaGln: 4.114 ± 0.084	10.6AlaArg: 10.6 ± 0.144	5.237AlaSer: 5.237 ± 0.104	6.289AlaThr: 6.289 ± 0.117	10.247AlaVal: 10.247 ± 0.147	1.804AlaTrp: 1.804 ± 0.06	2.554AlaTyr: 2.554 ± 0.074	0.0AlaXaa: 0.0 ± 0.0
Cys	0.877CysAla: 0.877 ± 0.036	0.193CysCys: 0.193 ± 0.018	0.57CysAsp: 0.57 ± 0.031	0.458CysGlu: 0.458 ± 0.029	0.286CysPhe: 0.286 ± 0.021	0.976CysGly: 0.976 ± 0.05	0.242CysHis: 0.242 ± 0.021	0.286CysIle: 0.286 ± 0.022	0.075CysLys: 0.075 ± 0.012	0.906CysLeu: 0.906 ± 0.044	0.112CysMet: 0.112 ± 0.013	0.145CysAsn: 0.145 ± 0.017	0.734CysPro: 0.734 ± 0.042	0.363CysGln: 0.363 ± 0.026	0.933CysArg: 0.933 ± 0.043	0.56CysSer: 0.56 ± 0.033	0.535CysThr: 0.535 ± 0.029	0.553CysVal: 0.553 ± 0.034	0.148CysTrp: 0.148 ± 0.017	0.213CysTyr: 0.213 ± 0.025	0.0CysXaa: 0.0 ± 0.0
Asp	5.153AspAla: 5.153 ± 0.106	0.418AspCys: 0.418 ± 0.028	2.92AspAsp: 2.92 ± 0.089	3.964AspGlu: 3.964 ± 0.091	1.508AspPhe: 1.508 ± 0.055	4.245AspGly: 4.245 ± 0.093	1.114AspHis: 1.114 ± 0.048	2.174AspIle: 2.174 ± 0.08	0.61AspLys: 0.61 ± 0.035	5.793AspLeu: 5.793 ± 0.085	0.68AspMet: 0.68 ± 0.038	0.628AspAsn: 0.628 ± 0.034	4.492AspPro: 4.492 ± 0.086	1.63AspGln: 1.63 ± 0.048	5.264AspArg: 5.264 ± 0.107	1.63AspSer: 1.63 ± 0.061	2.217AspThr: 2.217 ± 0.068	4.123AspVal: 4.123 ± 0.09	0.926AspTrp: 0.926 ± 0.04	1.178AspTyr: 1.178 ± 0.047	0.0AspXaa: 0.0 ± 0.0
Glu	7.945GluAla: 7.945 ± 0.162	0.483GluCys: 0.483 ± 0.035	2.589GluAsp: 2.589 ± 0.067	4.858GluGlu: 4.858 ± 0.127	1.867GluPhe: 1.867 ± 0.061	3.852GluGly: 3.852 ± 0.08	1.818GluHis: 1.818 ± 0.066	3.188GluIle: 3.188 ± 0.085	1.208GluLys: 1.208 ± 0.062	8.62GluLeu: 8.62 ± 0.129	0.969GluMet: 0.969 ± 0.042	1.051GluAsn: 1.051 ± 0.044	4.156GluPro: 4.156 ± 0.09	3.324GluGln: 3.324 ± 0.088	9.488GluArg: 9.488 ± 0.162	2.298GluSer: 2.298 ± 0.068	3.207GluThr: 3.207 ± 0.08	5.027GluVal: 5.027 ± 0.113	0.891GluTrp: 0.891 ± 0.043	1.266GluTyr: 1.266 ± 0.052	0.0GluXaa: 0.0 ± 0.0
Phe	3.964PheAla: 3.964 ± 0.086	0.298PheCys: 0.298 ± 0.026	1.947PheAsp: 1.947 ± 0.059	1.85PheGlu: 1.85 ± 0.053	1.084PhePhe: 1.084 ± 0.045	3.15PheGly: 3.15 ± 0.081	0.628PheHis: 0.628 ± 0.035	1.096PheIle: 1.096 ± 0.047	0.394PheLys: 0.394 ± 0.03	3.624PheLeu: 3.624 ± 0.101	0.38PheMet: 0.38 ± 0.03	0.539PheAsn: 0.539 ± 0.031	1.888PhePro: 1.888 ± 0.056	0.988PheGln: 0.988 ± 0.043	2.55PheArg: 2.55 ± 0.066	1.318PheSer: 1.318 ± 0.049	1.672PheThr: 1.672 ± 0.054	2.955PheVal: 2.955 ± 0.081	0.636PheTrp: 0.636 ± 0.037	0.753PheTyr: 0.753 ± 0.036	0.0PheXaa: 0.0 ± 0.0
Gly	7.82GlyAla: 7.82 ± 0.13	0.865GlyCys: 0.865 ± 0.041	3.737GlyAsp: 3.737 ± 0.083	5.006GlyGlu: 5.006 ± 0.106	2.908GlyPhe: 2.908 ± 0.074	5.88GlyGly: 5.88 ± 0.13	1.886GlyHis: 1.886 ± 0.056	4.45GlyIle: 4.45 ± 0.091	1.895GlyLys: 1.895 ± 0.061	8.486GlyLeu: 8.486 ± 0.137	1.79GlyMet: 1.79 ± 0.057	1.63GlyAsn: 1.63 ± 0.067	3.635GlyPro: 3.635 ± 0.091	3.174GlyGln: 3.174 ± 0.067	6.769GlyArg: 6.769 ± 0.12	4.018GlySer: 4.018 ± 0.097	4.94GlyThr: 4.94 ± 0.105	6.256GlyVal: 6.256 ± 0.123	1.534GlyTrp: 1.534 ± 0.05	2.205GlyTyr: 2.205 ± 0.063	0.0GlyXaa: 0.0 ± 0.0
His	2.317HisAla: 2.317 ± 0.062	0.263HisCys: 0.263 ± 0.021	1.17HisAsp: 1.17 ± 0.051	1.417HisGlu: 1.417 ± 0.055	0.696HisPhe: 0.696 ± 0.038	1.999HisGly: 1.999 ± 0.061	0.605HisHis: 0.605 ± 0.034	0.757HisIle: 0.757 ± 0.036	0.255HisLys: 0.255 ± 0.022	2.311HisLeu: 2.311 ± 0.065	0.282HisMet: 0.282 ± 0.022	0.354HisAsn: 0.354 ± 0.026	1.83HisPro: 1.83 ± 0.069	0.743HisGln: 0.743 ± 0.034	2.128HisArg: 2.128 ± 0.073	0.767HisSer: 0.767 ± 0.037	0.88HisThr: 0.88 ± 0.039	1.839HisVal: 1.839 ± 0.062	0.338HisTrp: 0.338 ± 0.027	0.528HisTyr: 0.528 ± 0.028	0.0HisXaa: 0.0 ± 0.0
Ile	6.101IleAla: 6.101 ± 0.103	0.343IleCys: 0.343 ± 0.027	3.075IleAsp: 3.075 ± 0.08	3.584IleGlu: 3.584 ± 0.103	1.112IlePhe: 1.112 ± 0.05	4.344IleGly: 4.344 ± 0.094	0.722IleHis: 0.722 ± 0.037	1.456IleIle: 1.456 ± 0.058	0.669IleLys: 0.669 ± 0.041	4.332IleLeu: 4.332 ± 0.098	0.549IleMet: 0.549 ± 0.034	0.668IleAsn: 0.668 ± 0.034	2.685IlePro: 2.685 ± 0.079	1.26IleGln: 1.26 ± 0.047	3.643IleArg: 3.643 ± 0.084	1.604IleSer: 1.604 ± 0.053	2.069IleThr: 2.069 ± 0.062	4.999IleVal: 4.999 ± 0.088	0.544IleTrp: 0.544 ± 0.031	0.856IleTyr: 0.856 ± 0.046	0.0IleXaa: 0.0 ± 0.0
Lys	1.6LysAla: 1.6 ± 0.059	0.103LysCys: 0.103 ± 0.013	0.596LysAsp: 0.596 ± 0.033	1.002LysGlu: 1.002 ± 0.05	0.364LysPhe: 0.364 ± 0.028	1.035LysGly: 1.035 ± 0.047	0.382LysHis: 0.382 ± 0.03	0.845LysIle: 0.845 ± 0.04	0.366LysLys: 0.366 ± 0.031	1.757LysLeu: 1.757 ± 0.06	0.277LysMet: 0.277 ± 0.022	0.324LysAsn: 0.324 ± 0.024	1.056LysPro: 1.056 ± 0.044	0.652LysGln: 0.652 ± 0.039	1.449LysArg: 1.449 ± 0.059	0.607LysSer: 0.607 ± 0.035	0.931LysThr: 0.931 ± 0.04	1.259LysVal: 1.259 ± 0.055	0.199LysTrp: 0.199 ± 0.021	0.401LysTyr: 0.401 ± 0.029	0.0LysXaa: 0.0 ± 0.0
Leu	16.728LeuAla: 16.728 ± 0.215	0.842LeuCys: 0.842 ± 0.038	6.427LeuAsp: 6.427 ± 0.11	7.7LeuGlu: 7.7 ± 0.143	3.469LeuPhe: 3.469 ± 0.095	9.622LeuGly: 9.622 ± 0.129	2.195LeuHis: 2.195 ± 0.058	4.185LeuIle: 4.185 ± 0.114	1.422LeuLys: 1.422 ± 0.05	13.517LeuLeu: 13.517 ± 0.218	1.475LeuMet: 1.475 ± 0.057	1.602LeuAsn: 1.602 ± 0.057	6.833LeuPro: 6.833 ± 0.105	3.603LeuGln: 3.603 ± 0.081	10.257LeuArg: 10.257 ± 0.171	5.031LeuSer: 5.031 ± 0.108	5.718LeuThr: 5.718 ± 0.104	11.362LeuVal: 11.362 ± 0.19	1.752LeuTrp: 1.752 ± 0.063	2.228LeuTyr: 2.228 ± 0.072	0.0LeuXaa: 0.0 ± 0.0
Met	1.924MetAla: 1.924 ± 0.062	0.101MetCys: 0.101 ± 0.014	0.673MetAsp: 0.673 ± 0.037	0.865MetGlu: 0.865 ± 0.043	0.399MetPhe: 0.399 ± 0.027	1.069MetGly: 1.069 ± 0.042	0.335MetHis: 0.335 ± 0.024	0.696MetIle: 0.696 ± 0.035	0.289MetLys: 0.289 ± 0.022	1.905MetLeu: 1.905 ± 0.054	0.286MetMet: 0.286 ± 0.021	0.316MetAsn: 0.316 ± 0.022	1.072MetPro: 1.072 ± 0.05	0.535MetGln: 0.535 ± 0.029	1.527MetArg: 1.527 ± 0.052	0.95MetSer: 0.95 ± 0.039	1.232MetThr: 1.232 ± 0.047	1.349MetVal: 1.349 ± 0.052	0.176MetTrp: 0.176 ± 0.016	0.274MetTyr: 0.274 ± 0.023	0.0MetXaa: 0.0 ± 0.0
Asn	1.931AsnAla: 1.931 ± 0.066	0.143AsnCys: 0.143 ± 0.016	0.896AsnAsp: 0.896 ± 0.036	1.081AsnGlu: 1.081 ± 0.053	0.478AsnPhe: 0.478 ± 0.03	1.684AsnGly: 1.684 ± 0.062	0.312AsnHis: 0.312 ± 0.027	0.725AsnIle: 0.725 ± 0.036	0.256AsnLys: 0.256 ± 0.021	1.855AsnLeu: 1.855 ± 0.059	0.263AsnMet: 0.263 ± 0.022	0.347AsnAsn: 0.347 ± 0.028	1.405AsnPro: 1.405 ± 0.05	0.553AsnGln: 0.553 ± 0.035	1.531AsnArg: 1.531 ± 0.056	0.586AsnSer: 0.586 ± 0.035	0.795AsnThr: 0.795 ± 0.036	1.489AsnVal: 1.489 ± 0.052	0.329AsnTrp: 0.329 ± 0.025	0.359AsnTyr: 0.359 ± 0.026	0.0AsnXaa: 0.0 ± 0.0
Pro	6.908ProAla: 6.908 ± 0.128	0.497ProCys: 0.497 ± 0.03	4.029ProAsp: 4.029 ± 0.081	5.17ProGlu: 5.17 ± 0.092	2.022ProPhe: 2.022 ± 0.059	5.146ProGly: 5.146 ± 0.106	1.365ProHis: 1.365 ± 0.049	2.66ProIle: 2.66 ± 0.076	0.879ProLys: 0.879 ± 0.041	6.387ProLeu: 6.387 ± 0.123	0.91ProMet: 0.91 ± 0.044	1.341ProAsn: 1.341 ± 0.052	3.861ProPro: 3.861 ± 0.111	1.74ProGln: 1.74 ± 0.061	4.123ProArg: 4.123 ± 0.082	3.169ProSer: 3.169 ± 0.078	3.56ProThr: 3.56 ± 0.107	5.718ProVal: 5.718 ± 0.103	1.001ProTrp: 1.001 ± 0.04	1.409ProTyr: 1.409 ± 0.043	0.0ProXaa: 0.0 ± 0.0
Gln	4.388GlnAla: 4.388 ± 0.094	0.338GlnCys: 0.338 ± 0.025	1.321GlnAsp: 1.321 ± 0.05	2.271GlnGlu: 2.271 ± 0.064	0.955GlnPhe: 0.955 ± 0.039	2.073GlnGly: 2.073 ± 0.06	0.875GlnHis: 0.875 ± 0.043	1.494GlnIle: 1.494 ± 0.058	0.558GlnLys: 0.558 ± 0.037	4.741GlnLeu: 4.741 ± 0.101	0.506GlnMet: 0.506 ± 0.03	0.633GlnAsn: 0.633 ± 0.036	2.583GlnPro: 2.583 ± 0.068	1.701GlnGln: 1.701 ± 0.074	4.349GlnArg: 4.349 ± 0.097	1.199GlnSer: 1.199 ± 0.052	1.452GlnThr: 1.452 ± 0.051	2.766GlnVal: 2.766 ± 0.078	0.532GlnTrp: 0.532 ± 0.029	0.774GlnTyr: 0.774 ± 0.038	0.0GlnXaa: 0.0 ± 0.0
Arg	10.18ArgAla: 10.18 ± 0.149	1.081ArgCys: 1.081 ± 0.047	4.581ArgAsp: 4.581 ± 0.091	6.617ArgGlu: 6.617 ± 0.136	3.465ArgPhe: 3.465 ± 0.078	5.897ArgGly: 5.897 ± 0.104	2.134ArgHis: 2.134 ± 0.07	4.707ArgIle: 4.707 ± 0.09	1.431ArgLys: 1.431 ± 0.052	10.654ArgLeu: 10.654 ± 0.144	1.719ArgMet: 1.719 ± 0.062	1.564ArgAsn: 1.564 ± 0.058	5.282ArgPro: 5.282 ± 0.104	3.765ArgGln: 3.765 ± 0.095	9.087ArgArg: 9.087 ± 0.145	4.71ArgSer: 4.71 ± 0.117	4.776ArgThr: 4.776 ± 0.095	7.316ArgVal: 7.316 ± 0.12	1.836ArgTrp: 1.836 ± 0.061	2.439ArgTyr: 2.439 ± 0.067	0.0ArgXaa: 0.0 ± 0.0
Ser	4.585SerAla: 4.585 ± 0.108	0.478SerCys: 0.478 ± 0.032	2.329SerAsp: 2.329 ± 0.064	2.721SerGlu: 2.721 ± 0.069	1.532SerPhe: 1.532 ± 0.048	4.368SerGly: 4.368 ± 0.082	0.88SerHis: 0.88 ± 0.039	1.785SerIle: 1.785 ± 0.064	0.589SerLys: 0.589 ± 0.034	5.08SerLeu: 5.08 ± 0.098	0.957SerMet: 0.957 ± 0.039	0.704SerAsn: 0.704 ± 0.037	3.127SerPro: 3.127 ± 0.087	1.459SerGln: 1.459 ± 0.054	3.53SerArg: 3.53 ± 0.084	2.392SerSer: 2.392 ± 0.074	2.294SerThr: 2.294 ± 0.076	3.626SerVal: 3.626 ± 0.085	0.826SerTrp: 0.826 ± 0.044	0.926SerTyr: 0.926 ± 0.042	0.0SerXaa: 0.0 ± 0.0
Thr	5.721ThrAla: 5.721 ± 0.12	0.443ThrCys: 0.443 ± 0.035	2.324ThrAsp: 2.324 ± 0.065	2.843ThrGlu: 2.843 ± 0.081	1.759ThrPhe: 1.759 ± 0.057	4.858ThrGly: 4.858 ± 0.106	1.098ThrHis: 1.098 ± 0.046	2.615ThrIle: 2.615 ± 0.067	0.743ThrLys: 0.743 ± 0.042	6.218ThrLeu: 6.218 ± 0.119	0.893ThrMet: 0.893 ± 0.041	0.971ThrAsn: 0.971 ± 0.045	3.917ThrPro: 3.917 ± 0.121	1.436ThrGln: 1.436 ± 0.052	3.936ThrArg: 3.936 ± 0.085	2.437ThrSer: 2.437 ± 0.065	3.014ThrThr: 3.014 ± 0.085	5.55ThrVal: 5.55 ± 0.108	0.76ThrTrp: 0.76 ± 0.038	1.145ThrTyr: 1.145 ± 0.047	0.0ThrXaa: 0.0 ± 0.0
Val	10.607ValAla: 10.607 ± 0.154	0.716ValCys: 0.716 ± 0.04	4.37ValAsp: 4.37 ± 0.09	6.136ValGlu: 6.136 ± 0.113	2.646ValPhe: 2.646 ± 0.073	6.244ValGly: 6.244 ± 0.121	1.707ValHis: 1.707 ± 0.06	4.037ValIle: 4.037 ± 0.091	1.253ValLys: 1.253 ± 0.056	10.342ValLeu: 10.342 ± 0.154	1.185ValMet: 1.185 ± 0.047	1.471ValAsn: 1.471 ± 0.054	5.653ValPro: 5.653 ± 0.104	2.812ValGln: 2.812 ± 0.08	7.965ValArg: 7.965 ± 0.126	3.969ValSer: 3.969 ± 0.083	5.305ValThr: 5.305 ± 0.086	8.284ValVal: 8.284 ± 0.153	1.18ValTrp: 1.18 ± 0.049	1.701ValTyr: 1.701 ± 0.054	0.0ValXaa: 0.0 ± 0.0
Trp	1.361TrpAla: 1.361 ± 0.052	0.193TrpCys: 0.193 ± 0.021	0.696TrpAsp: 0.696 ± 0.038	0.981TrpGlu: 0.981 ± 0.047	0.601TrpPhe: 0.601 ± 0.035	1.041TrpGly: 1.041 ± 0.046	0.411TrpHis: 0.411 ± 0.03	0.873TrpIle: 0.873 ± 0.045	0.265TrpLys: 0.265 ± 0.02	2.28TrpLeu: 2.28 ± 0.076	0.321TrpMet: 0.321 ± 0.025	0.399TrpAsn: 0.399 ± 0.028	0.844TrpPro: 0.844 ± 0.038	0.746TrpGln: 0.746 ± 0.041	1.555TrpArg: 1.555 ± 0.064	0.906TrpSer: 0.906 ± 0.047	0.821TrpThr: 0.821 ± 0.039	1.154TrpVal: 1.154 ± 0.049	0.363TrpTrp: 0.363 ± 0.031	0.422TrpTyr: 0.422 ± 0.029	0.0TrpXaa: 0.0 ± 0.0
Tyr	2.289TyrAla: 2.289 ± 0.071	0.268TyrCys: 0.268 ± 0.019	1.201TyrAsp: 1.201 ± 0.049	1.457TyrGlu: 1.457 ± 0.055	0.809TyrPhe: 0.809 ± 0.039	2.034TyrGly: 2.034 ± 0.064	0.492TyrHis: 0.492 ± 0.029	0.77TyrIle: 0.77 ± 0.038	0.27TyrLys: 0.27 ± 0.022	2.521TyrLeu: 2.521 ± 0.078	0.228TyrMet: 0.228 ± 0.021	0.397TyrAsn: 0.397 ± 0.03	1.475TyrPro: 1.475 ± 0.051	0.912TyrGln: 0.912 ± 0.04	2.557TyrArg: 2.557 ± 0.075	0.802TyrSer: 0.802 ± 0.033	0.973TyrThr: 0.973 ± 0.042	1.714TyrVal: 1.714 ± 0.058	0.46TyrTrp: 0.46 ± 0.03	0.544TyrTyr: 0.544 ± 0.036	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 2050 proteins (573660 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

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

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