Physicochemical Properties of Peptide



PPepDB ID:PPepDB_589
Number of amino acids:105
Molecular Weight:11067.86 Da
Theoretical pI:6.77


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1413.33%
Cysteine CYS (C)65.71%
Glutamic Acid GLU (E)65.71%
Aspartic Acid ASP (D)32.86%
Glycine GLY (G)65.71%
Phynylalanine PHE (F)32.86%
Isoleucine ILE (I)87.62%
Histidine HIS (H)10.95%
Lysine LYS (K)76.67%
Methionine MET (M)00%
Leucine LEU (L)1211.43%
Asparagine ASN (N)65.71%
Glutamine GLN (Q)21.9%
Proline PRO (P)54.76%
Serine SER (S)98.57%
Arginine ARG (R)21.9%
Threonine THR (T)54.76%
Tryptophan TRP (W)10.95%
Valine VAL (V)76.67%
Tyrosine TYR (Y)21.9%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC491
HydrogenH797
NitrogenN129
OxygenO148
SulphurS6

FormulaC491H797N129O148S6
Total Number of Atoms:1571


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8855
Absorption 0.1% (=1 g/l)    0.800,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.766,   assuming all CYS residues are reduced
Aromaticity:0.057

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.87

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.43, 24.76, 30.48]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:106.952
Grand average of hydropathicity (GRAVY):0.34