Comparative proteome analysis of psychrophilic versus mesophilic bacterial species: Insights into the molecular basis of cold adaptation of proteins

Metpally, Raghu Prasad Rao; Reddy, Boojala Vijay B

doi:10.1186/1471-2164-10-11

Table 2 Distribution of amino acids and property group parameters in the predicted secondary structural elements of psychrophilic and mesophilic proteomes.

From: Comparative proteome analysis of psychrophilic versus mesophilic bacterial species: Insights into the molecular basis of cold adaptation of proteins

	α-Helix					β-Sheet					Coil
Amino Acids	Psychro		Meso			Psychro		Meso			Psychro		Meso
	Avg	SD	Avg	SD	t-val	Avg	SD	Avg	SD	t-val	Avg	SD	Avg	SD	t-val
Ala (A)	5.23	0.95	4.79	0.09	0.906	1.15	0.07	1.05	0.12	1.745	2.83	0.61	2.27	0.56	1.963
Cys (C)	0.41	0.11	0.42	0.00	-0.097	0.22	0.05	0.23	0.04	-0.026	0.37	0.08	0.35	0.02	0.524
Asp (D)	1.90	0.13	1.88	0.00	0.176	0.52	0.09	0.50	0.02	0.466	3.09	0.23	2.75	0.34	2.660
Glu (E)	3.04	0.22	3.42	0.02	-2.480	0.70	0.09	0.74	0.04	-1.086	2.09	0.10	2.18	-0.08	-1.487
Phe (F)	2.03	0.24	2.24	0.01	-1.378	0.97	0.17	1.02	0.15	-0.526	1.07	0.07	1.10	-0.03	-0.544
Gly (G)	1.81	0.19	1.87	0.01	-0.593	0.66	0.08	0.68	0.05	-0.494	4.58	0.71	4.11	0.47	1.392
His (H)	0.83	0.08	0.83	0.00	0.047	0.36	0.04	0.35	0.03	0.366	0.92	0.07	0.91	0.01	0.295
Ile (I)	3.26	0.49	3.45	0.03	-0.722	1.97	0.29	1.99	0.20	-0.134	1.38	0.16	1.32	0.06	0.734
Lys (K)	2.48	0.54	3.00	0.17	-1.123	0.65	0.16	0.77	0.21	-1.043	2.11	0.36	2.41	-0.30	-0.876
Leu (L)	6.03	0.23	6.42	0.01	-2.619	2.01	0.14	2.04	0.19	-0.294	2.29	0.13	2.24	0.06	0.612
Met (M)	1.22	0.16	1.26	0.01	-0.363	0.38	0.05	0.38	0.05	-0.245	0.86	0.05	0.84	0.02	0.633
Asn (N)	1.36	0.27	1.59	0.02	-1.383	0.41	0.12	0.45	0.07	-0.725	2.51	0.46	2.67	-0.16	-0.572
Pro (P)	0.98	0.07	1.01	0.01	-0.409	0.26	0.03	0.28	0.04	-0.950	2.76	0.51	2.65	0.11	0.353
Gln (Q)	2.27	0.21	2.45	0.03	-0.956	0.53	0.10	0.54	0.08	-0.359	1.51	0.18	1.53	-0.02	-0.166
Arg (R)	2.31	0.44	2.32	0.03	-0.041	0.70	0.06	0.71	0.12	-0.175	1.61	0.37	1.53	0.07	0.383
Ser (S)	2.65	0.17	2.55	0.01	0.798	0.90	0.14	0.81	0.10	1.190	3.26	0.22	2.76	0.50	4.981
Thr (T)	2.07	0.11	2.06	0.01	0.133	1.15	0.09	1.07	0.10	1.335	2.32	0.20	2.06	0.25	2.418
Val (V)	2.98	0.25	2.97	0.01	0.038	2.34	0.20	2.28	0.15	0.598	1.56	0.19	1.38	0.18	1.912
Trp (W)	0.62	0.09	0.66	0.01	-0.431	0.25	0.04	0.24	0.07	0.186	0.32	0.06	0.30	0.02	0.598
Tyr (Y)	1.32	0.19	1.51	0.01	-1.554	0.75	0.15	0.83	0.11	-1.066	0.86	0.09	0.92	-0.06	-0.979
All AA	44.81	1.56	46.73	0.18	-2.507	16.88	1.58	16.98	0.34	-0.153	38.31	1.90	36.29	2.02	2.379
Amino Acid Property Groups
Tiny	12.18	0.90	11.70	0.14	0.913	4.08	0.36	3.84	0.24	1.336	13.37	1.54	11.56	0.11	2.537
Small	19.39	0.95	19.16	0.18	0.415	7.62	0.58	7.37	0.31	0.946	23.29	2.03	21.02	0.18	2.435
Aliphatic	12.27	0.56	12.85	0.01	-2.279	6.33	0.31	6.32	0.15	0.090	5.23	0.22	4.94	0.01	2.443
Non-polar	25.90	1.07	26.62	0.14	-1.241	10.97	0.80	11.03	0.28	-0.171	18.89	1.80	17.49	0.24	1.594
Aromatic	4.81	0.39	5.24	0.01	-2.235	2.32	0.36	2.44	0.17	-0.719	3.18	0.17	3.24	0.00	-0.651
Polar	18.91	0.95	20.11	0.21	-1.987	5.91	0.78	5.95	0.14	-0.129	19.42	0.83	18.80	0.09	1.340
Charged	10.56	0.57	11.46	0.17	-1.923	2.93	0.35	3.06	0.14	-0.895	9.82	0.16	9.78	0.05	0.192
Basic	5.61	0.36	6.15	0.06	-1.863	1.71	0.17	1.82	0.11	-1.353	4.64	0.07	4.85	0.04	-1.041
Acidic	4.94	0.22	5.31	0.03	-1.892	1.22	0.18	1.24	0.03	-0.335	5.19	0.21	4.93	0.01	2.287
Neutral	9.64	0.36	9.77	0.05	-0.469	3.59	0.43	3.46	0.16	0.674	12.59	0.98	11.38	0.09	2.430
H-philic	13.36	0.69	14.67	0.18	-2.552	3.51	0.52	3.72	0.13	-0.940	12.91	0.67	13.06	0.11	-0.356
H-phobic	23.11	0.85	23.73	0.09	-1.352	10.04	0.71	10.06	0.22	-0.067	11.56	0.66	10.72	0.02	2.715

Significant compositional differences as indicated by t-test parameter are shown in bold.

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