Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4267
Number of amino acids:480
Molecular Weight:54625.58 Da
Theoretical pI:6.78


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)326.67%
Cysteine CYS (C)61.25%
Glutamic Acid GLU (E)418.54%
Aspartic Acid ASP (D)234.79%
Glycine GLY (G)387.92%
Phynylalanine PHE (F)245%
Isoleucine ILE (I)255.21%
Histidine HIS (H)71.46%
Lysine LYS (K)142.92%
Methionine MET (M)102.08%
Leucine LEU (L)377.71%
Asparagine ASN (N)224.58%
Glutamine GLN (Q)316.46%
Proline PRO (P)183.75%
Serine SER (S)357.29%
Arginine ARG (R)4910.21%
Threonine THR (T)142.92%
Tryptophan TRP (W)61.25%
Valine VAL (V)367.5%
Tyrosine TYR (Y)122.5%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2393
HydrogenH3772
NitrogenN714
OxygenO723
SulphurS16

FormulaC2393H3772N714O723S16
Total Number of Atoms:7618


Total number of positively charged residues (ARG + LYS):63
Total number of negatively charged residues (ASP + GLU):64
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    51255
Absorption 0.1% (=1 g/l)    0.938,   assuming all pairs of CYS residues form cystines

Ext. coefficient    50880
Absorption 0.1% (=1 g/l)    0.931,   assuming all CYS residues are reduced
Aromaticity:0.088

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 51.64

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.17, 23.54, 25.00]

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:78.7916
Grand average of hydropathicity (GRAVY):-0.51