Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3038
Number of amino acids:45
Molecular Weight:4929.89 Da
Theoretical pI:9.75


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)12.22%
Cysteine CYS (C)817.78%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)48.89%
Phynylalanine PHE (F)12.22%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)511.11%
Methionine MET (M)00%
Leucine LEU (L)511.11%
Asparagine ASN (N)24.44%
Glutamine GLN (Q)12.22%
Proline PRO (P)24.44%
Serine SER (S)511.11%
Arginine ARG (R)511.11%
Threonine THR (T)48.89%
Tryptophan TRP (W)00%
Valine VAL (V)12.22%
Tyrosine TYR (Y)12.22%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC202
HydrogenH348
NitrogenN68
OxygenO59
SulphurS8

FormulaC202H348N68O59S8
Total Number of Atoms:685


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):0
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    1990
Absorption 0.1% (=1 g/l)    0.404,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.302,   assuming all CYS residues are reduced
Aromaticity:0.044

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.54

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[17.78, 28.89, 13.33]

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:51.9999
Grand average of hydropathicity (GRAVY):-0.39