Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5837
Number of amino acids:509
Molecular Weight:56502.59 Da
Theoretical pI:7.76


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)295.7%
Cysteine CYS (C)71.38%
Glutamic Acid GLU (E)214.13%
Aspartic Acid ASP (D)183.54%
Glycine GLY (G)489.43%
Phynylalanine PHE (F)132.55%
Isoleucine ILE (I)295.7%
Histidine HIS (H)91.77%
Lysine LYS (K)112.16%
Methionine MET (M)101.96%
Leucine LEU (L)428.25%
Asparagine ASN (N)326.29%
Glutamine GLN (Q)7915.52%
Proline PRO (P)295.7%
Serine SER (S)254.91%
Arginine ARG (R)295.7%
Threonine THR (T)224.32%
Tryptophan TRP (W)50.98%
Valine VAL (V)397.66%
Tyrosine TYR (Y)122.36%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2457
HydrogenH3909
NitrogenN741
OxygenO758
SulphurS17

FormulaC2457H3909N741O758S17
Total Number of Atoms:7882


Total number of positively charged residues (ARG + LYS):40
Total number of negatively charged residues (ASP + GLU):39
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    45755
Absorption 0.1% (=1 g/l)    0.810,   assuming all pairs of CYS residues form cystines

Ext. coefficient    45380
Absorption 0.1% (=1 g/l)    0.803,   assuming all CYS residues are reduced
Aromaticity:0.059

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 48.19

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.50, 26.33, 20.04]

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:82.3183
Grand average of hydropathicity (GRAVY):-0.53