Physicochemical Properties of Peptide



PPepDB ID:PPepDB_275
Number of amino acids:29
Molecular Weight:2884.34 Da
Theoretical pI:5.96


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)620.69%
Glutamic Acid GLU (E)13.45%
Aspartic Acid ASP (D)00%
Glycine GLY (G)620.69%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)26.9%
Asparagine ASN (N)26.9%
Glutamine GLN (Q)00%
Proline PRO (P)310.34%
Serine SER (S)13.45%
Arginine ARG (R)13.45%
Threonine THR (T)310.34%
Tryptophan TRP (W)13.45%
Valine VAL (V)310.34%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC117
HydrogenH187
NitrogenN35
OxygenO38
SulphurS6

FormulaC117H187N35O38S6
Total Number of Atoms:383


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

Ext. coefficient    5875
Absorption 0.1% (=1 g/l)    2.037,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    1.907,   assuming all CYS residues are reduced
Aromaticity:0.034

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.36

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.69, 41.38, 10.34]

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:56.8965
Grand average of hydropathicity (GRAVY):0.32