Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2341
Number of amino acids:32
Molecular Weight:3592.1 Da
Theoretical pI:6.08


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)618.75%
Glutamic Acid GLU (E)13.13%
Aspartic Acid ASP (D)26.25%
Glycine GLY (G)39.38%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)13.13%
Histidine HIS (H)00%
Lysine LYS (K)26.25%
Methionine MET (M)13.13%
Leucine LEU (L)00%
Asparagine ASN (N)26.25%
Glutamine GLN (Q)00%
Proline PRO (P)412.5%
Serine SER (S)26.25%
Arginine ARG (R)13.13%
Threonine THR (T)26.25%
Tryptophan TRP (W)13.13%
Valine VAL (V)13.13%
Tyrosine TYR (Y)39.38%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC151
HydrogenH224
NitrogenN40
OxygenO48
SulphurS7

FormulaC151H224N40O48S7
Total Number of Atoms:470


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

Ext. coefficient    10345
Absorption 0.1% (=1 g/l)    2.880,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    2.776,   assuming all CYS residues are reduced
Aromaticity:0.125

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.70

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[18.75, 34.38, 6.25]

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:21.25
Grand average of hydropathicity (GRAVY):-0.61