Physicochemical Properties of Peptide



PPepDB ID:PPepDB_638
Number of amino acids:40
Molecular Weight:4133.66 Da
Theoretical pI:10.76


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)615%
Cysteine CYS (C)12.5%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)615%
Phynylalanine PHE (F)12.5%
Isoleucine ILE (I)37.5%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)12.5%
Asparagine ASN (N)410%
Glutamine GLN (Q)00%
Proline PRO (P)37.5%
Serine SER (S)12.5%
Arginine ARG (R)37.5%
Threonine THR (T)615%
Tryptophan TRP (W)25%
Valine VAL (V)25%
Tyrosine TYR (Y)12.5%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC183
HydrogenH283
NitrogenN55
OxygenO53
SulphurS1

FormulaC183H283N55O53S1
Total Number of Atoms:575


Total number of positively charged residues (ARG + LYS):3
Total number of negatively charged residues (ASP + GLU):0
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    12490
Absorption 0.1% (=1 g/l)    3.022,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12490
Absorption 0.1% (=1 g/l)    3.022,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.58

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.00, 35.00, 17.50]

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:68.5
Grand average of hydropathicity (GRAVY):-0.03