Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2482
Number of amino acids:49
Molecular Weight:5435.48 Da
Theoretical pI:8.59


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)36.12%
Cysteine CYS (C)1020.41%
Glutamic Acid GLU (E)48.16%
Aspartic Acid ASP (D)12.04%
Glycine GLY (G)36.12%
Phynylalanine PHE (F)12.04%
Isoleucine ILE (I)36.12%
Histidine HIS (H)12.04%
Lysine LYS (K)714.29%
Methionine MET (M)00%
Leucine LEU (L)24.08%
Asparagine ASN (N)12.04%
Glutamine GLN (Q)12.04%
Proline PRO (P)36.12%
Serine SER (S)12.04%
Arginine ARG (R)24.08%
Threonine THR (T)48.16%
Tryptophan TRP (W)12.04%
Valine VAL (V)12.04%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC227
HydrogenH375
NitrogenN67
OxygenO67
SulphurS10

FormulaC227H375N67O67S10
Total Number of Atoms:746


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):5
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    6125
Absorption 0.1% (=1 g/l)    1.127,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    1.012,   assuming all CYS residues are reduced
Aromaticity:0.041

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 66.11

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[16.33, 16.33, 18.37]

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:51.8367
Grand average of hydropathicity (GRAVY):-0.33