Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4969
Number of amino acids:404
Molecular Weight:44628.6 Da
Theoretical pI:8.53


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)174.21%
Cysteine CYS (C)102.48%
Glutamic Acid GLU (E)133.22%
Aspartic Acid ASP (D)256.19%
Glycine GLY (G)358.66%
Phynylalanine PHE (F)204.95%
Isoleucine ILE (I)204.95%
Histidine HIS (H)122.97%
Lysine LYS (K)102.48%
Methionine MET (M)112.72%
Leucine LEU (L)4210.4%
Asparagine ASN (N)245.94%
Glutamine GLN (Q)112.72%
Proline PRO (P)256.19%
Serine SER (S)4310.64%
Arginine ARG (R)327.92%
Threonine THR (T)225.45%
Tryptophan TRP (W)30.74%
Valine VAL (V)215.2%
Tyrosine TYR (Y)81.98%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1950
HydrogenH3074
NitrogenN572
OxygenO589
SulphurS21

FormulaC1950H3074N572O589S21
Total Number of Atoms:6206


Total number of positively charged residues (ARG + LYS):42
Total number of negatively charged residues (ASP + GLU):38
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    29045
Absorption 0.1% (=1 g/l)    0.651,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    0.637,   assuming all CYS residues are reduced
Aromaticity:0.077

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 49.42

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.22, 31.44, 20.54]

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:79.1335
Grand average of hydropathicity (GRAVY):-0.31