Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4511
Number of amino acids:518
Molecular Weight:58544.52 Da
Theoretical pI:8.79


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)346.56%
Cysteine CYS (C)81.54%
Glutamic Acid GLU (E)275.21%
Aspartic Acid ASP (D)142.7%
Glycine GLY (G)387.34%
Phynylalanine PHE (F)305.79%
Isoleucine ILE (I)265.02%
Histidine HIS (H)112.12%
Lysine LYS (K)173.28%
Methionine MET (M)61.16%
Leucine LEU (L)397.53%
Asparagine ASN (N)336.37%
Glutamine GLN (Q)6913.32%
Proline PRO (P)234.44%
Serine SER (S)417.92%
Arginine ARG (R)305.79%
Threonine THR (T)203.86%
Tryptophan TRP (W)40.77%
Valine VAL (V)305.79%
Tyrosine TYR (Y)183.47%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2582
HydrogenH3993
NitrogenN753
OxygenO782
SulphurS14

FormulaC2582H3993N753O782S14
Total Number of Atoms:8124


Total number of positively charged residues (ARG + LYS):47
Total number of negatively charged residues (ASP + GLU):41
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    49320
Absorption 0.1% (=1 g/l)    0.842,   assuming all pairs of CYS residues form cystines

Ext. coefficient    48820
Absorption 0.1% (=1 g/l)    0.834,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 59.11

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.38, 26.06, 20.46]

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:72.2973
Grand average of hydropathicity (GRAVY):-0.57