Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3588
Number of amino acids:45
Molecular Weight:4697.44 Da
Theoretical pI:9.8


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)511.11%
Cysteine CYS (C)48.89%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)12.22%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)36.67%
Histidine HIS (H)00%
Lysine LYS (K)36.67%
Methionine MET (M)00%
Leucine LEU (L)24.44%
Asparagine ASN (N)511.11%
Glutamine GLN (Q)00%
Proline PRO (P)36.67%
Serine SER (S)715.56%
Arginine ARG (R)36.67%
Threonine THR (T)48.89%
Tryptophan TRP (W)00%
Valine VAL (V)48.89%
Tyrosine TYR (Y)12.22%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC196
HydrogenH336
NitrogenN62
OxygenO63
SulphurS4

FormulaC196H336N62O63S4
Total Number of Atoms:661


Total number of positively charged residues (ARG + LYS):6
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    1740
Absorption 0.1% (=1 g/l)    0.370,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.317,   assuming all CYS residues are reduced
Aromaticity:0.022

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 77.56

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.22, 35.56, 15.56]

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:80.2222
Grand average of hydropathicity (GRAVY):-0.02